Dit is ons nieuw hondje Kira, een kruising van een waterhond en een Podenko. Ze is sinds 7 februari 2024 bij ons en druk bezig ons hart te veroveren. Het is een lief, aanhankelijk hondje, dat zich op een week snel aan ons heeft aangepast. Ze is heel vinnig en nieuwsgierig, een heel ander hondje dan Noleke.
This is our new dog Kira, a cross between a water dog and a Podenko. She has been with us since February 7, 2024 and is busy winning our hearts. She is a sweet, affectionate dog who quickly adapted to us within a week. She is very quick and curious, a very different dog than Noleke.
DEAR VISITOR,
MY BLOG EXISTS ALREADY 12 YEARS AND 11 MONTHS.
ON 06/05/2024 MORE THAN 1.972.210
VISITORS FROM 134 DIFFERENT NATIONS ALREADY FOUND THEIR WAY TO MY BLOG.
THAT IS AN AVERAGE OF 400GUESTS PER DAY.
THANK YOU FOR VISITING MY BLOG AND HOPE YOU ENJOY EACH TIME.
The purpose of this blog is the creation of an open, international, independent and free forum, where every UFO-researcher can publish the results of his/her research. The languagues, used for this blog, are Dutch, English and French.You can find the articles of a collegue by selecting his category. Each author stays resposable for the continue of his articles. As blogmaster I have the right to refuse an addition or an article, when it attacks other collegues or UFO-groupes.
Druk op onderstaande knop om te reageren in mijn forum
Zoeken in blog
Deze blog is opgedragen aan mijn overleden echtgenote Lucienne.
In 2012 verloor ze haar moedige strijd tegen kanker!
In 2011 startte ik deze blog, omdat ik niet mocht stoppen met mijn UFO-onderzoek.
BEDANKT!!!
Een interessant adres?
UFO'S of UAP'S, ASTRONOMIE, RUIMTEVAART, ARCHEOLOGIE, OUDHEIDKUNDE, SF-SNUFJES EN ANDERE ESOTERISCHE WETENSCHAPPEN - DE ALLERLAATSTE NIEUWTJES
UFO's of UAP'S in België en de rest van de wereld In België had je vooral BUFON of het Belgisch UFO-Netwerk, dat zich met UFO's bezighoudt. BEZOEK DUS ZEKER VOOR ALLE OBJECTIEVE INFORMATIE , enkel nog beschikbaar via Facebook en deze blog.
Verder heb je ook het Belgisch-Ufo-meldpunt en Caelestia, die prachtig, doch ZEER kritisch werk leveren, ja soms zelfs héél sceptisch...
Voor Nederland kan je de mooie site www.ufowijzer.nl bezoeken van Paul Harmans. Een mooie site met veel informatie en artikels.
MUFON of het Mutual UFO Network Inc is een Amerikaanse UFO-vereniging met afdelingen in alle USA-staten en diverse landen.
MUFON's mission is the analytical and scientific investigation of the UFO- Phenomenon for the benefit of humanity...
Je kan ook hun site bekijken onder www.mufon.com.
Ze geven een maandelijks tijdschrift uit, namelijk The MUFON UFO-Journal.
Since 02/01/2020 is Pieter ex-president (=voorzitter) of BUFON, but also ex-National Director MUFON / Flanders and the Netherlands. We work together with the French MUFON Reseau MUFON/EUROP.
ER IS EEN NIEUWE GROEPERING DIE ZICH BUFON NOEMT, MAAR DIE HEBBEN NIETS MET ONZE GROEP TE MAKEN. DEZE COLLEGA'S GEBRUIKEN DE NAAM BUFON VOOR HUN SITE... Ik wens hen veel succes met de verdere uitbouw van hun groep. Zij kunnen de naam BUFON wel geregistreerd hebben, maar het rijke verleden van BUFON kunnen ze niet wegnemen...
12-05-2020
Alien Entity Appeared In Church In Infrared Camera, Video, UFO Sighting News.
Alien Entity Appeared In Church In Infrared Camera, Video, UFO Sighting News.
Date of sighting: May 2, 2020 Location of sighting: Mississippi, USA Here is some great raw video from some ghost hunters in Mississippi. Last week they were recording inside an old church using a special infrared camera when something appeared in front of them. A jellyfish shaped orb appeared. Very rare, never seen an orb quite like this before. It almost appears to have long legs and begins to move closer to the person holding the camera, but then vanishes. Looks like they caught an alien entity. They call it a ghost, but I really feel that these smaller orbs are alien entities living amounts that we cant normally see with the human eye. Its a well known fact that infrared cameras record cloaked UFOs, orbs and entities that the human eye cannot see. Even the US military and the Chile military releases UFO videos in infrared of them changing UFOs. So...infrared works...both at night and during the day. Scott C. Waring
Here is an interesting capture in Mississippi this week. A person spotted a orange ball moving across the sky. The UFO traveled across the sky at the same speed as a jet. Such UFOs have been seen a lot around the world. But I think aliens are taking notice that most people are on lock down and unable to see the sky, so aliens have free access to the sky for a while in some locations. From the screenshot above, I can tell you this is not a plane, helicopter or rocket...this is a glowing orb craft. This is 100% alien made. Scott C. Waring - Taiwan
News states:
For one Natchez resident, a late-night trip out of his house turned into an otherworldly experience when he spotted a bright orange fireball streak across the sky. “It scared the heck out of me,” Alex Sandel said Monday morning. “It was bright orange, red and spinning.” Living near Merit Health Natchez, Sandel said he has stepped outside to watch a helicopter take off from the hospital’s helipad Sunday evening at approximately 10:15 when he was startled by the fireball streaking across the sky. “I was outside waiting for the helicopter to take off when I saw this thing coming,” Sandel said. “It came from the north and went straight south.” Sandel said the fireball was traveling at a slow enough speed for him to reach his phone to capture an image of the flying object. “It wasn’t any faster than a jet,” Sandel said.
Drone Caught A Fastwalker Speeding Over Medvednica, Croatia
Drone Caught A Fastwalker Speeding Over Medvednica, Croatia
Adrone accidentally recorded a UFO or more likely a fastwalker moving at an incredible speed over Medvednica, Zagreb, Croatia.
On May 10, 2020.a drone owner was shooting video material for his video with his drone and in the montage he noticed a white object moving at high speed towards the drone, but he couldn't identify what it could be.
“Fastwalker” is a term used by NORAD and branches of armed forces to describe unidentified aerial phenomena moving and/or changing directions at high speed far beyond what current aerospace technology is capable of.
Usually these objects are observed in space and although it is assumed that these objects only move in space, in recent years, these fastwalkers have also been filmed while moving through our atmosphere at such an incredible speed that is not perceptible to the naked eye.
The Croatia footage shows such a mysterious fastwalker.
The Air Force Said This Object Was The Moon. Was It?
The Air Force Said This Object Was The Moon. Was It?
Before Project Blue Book came Project Grudge, an Air Force project its director later admitted was to debunk the UFO phenomenon. One file buried in the Grudge data concerns a cylindrical object photographed above Manhattan in 1950 — by one of New York City's most prestigious photographers (now featured in the Library of Congress).
The photographer, Irving Underhill, was adamant what was in the photo was an object, that wasn't there before or after it was shot.
The Air Force, though, had other ideas. They believed he misidentified the Moon, and forgot he was taking a time-lapse image.
In this video, we'll explore that hypothesis, and show its many issues, including the USAF's statement that the photo happened during sunset (the only time the Moon was in that part of the sky). Underhill's photo, taken at night, was used for a postcard titled "Night Lights from Queensboro Bridge."
In isolation, this may not be a big deal. But the early 1950s were full of cylindrical UFO sightings, including several made by trained observers noting cylinders traveling — strangely — through the air in an upright position or at an angle. We'll discuss all of this in today's episode.
Triangle-shaped UFO filmed over Lemon Grove, California 4-May-2020
Triangle-shaped UFO filmed over Lemon Grove, California 4-May-2020
Check out this amazing footage of a triangle UFO flying across the night sky above Lemon Grove, a city in San Diego County, California. This happened on 4th May 2020.
A dazzling new image of Jupiter makes the planet look like a gigantic, swirling ball of fire.
While it’s a dramatic sight to behold, the image doesn’t really show what Jupiter looks like through a telescope, BBC News reports. Rather, it’s a composite taken with a technique called “lucky imaging” that peers beneath the planet’s cloudy surface and shows the tumultuous distribution of heat hiding beneath.
Focusing In
Even though it’s an infrared heatmap, the new image is still among the sharpest images of Jupiter ever taken from Earth, according to BBC News.
That’s because lucky imaging helps filter out the usual blurriness caused by Jupiter’s extremely turbulent atmosphere, resulting in a much sharper image. This final image, from Hawaii’s Gemini North Telescope, combined a lot of those lucky images — letting researchers focus on the entire planet, bit by bit.
In a reportpublished last month, a team of scientists discussed how to ensure that human space travelers don’t contaminate distant planets — and that they don’t bring back extraterrestrial pollutants back to Earth, a topic that seems more pertinent than ever in the midst of a global pandemic.
“In my opinion, and that of the science community, the chance that rocks from Mars that are millions of years old will contain an active life form that could infect Earth is extremely low,” said adjunct Stanford professor of aeronautics and astronautics Scott Hubbard, co-author of the report, in an interview with Stanford News. “But, the [Mars] samples returned by [NASA] will be quarantined and treated as though they are the Ebola virus until proven safe.
The solution, Hubbard said, is “planetary protection.” Now that humanity is edging ever closer to traveling to Mars thanks to SpaceX and NASA, Hubbard and the rest of the committee argue that the US government and private sector need to “‘continually authorize and supervise’ private activities in space,” Hubbard told Stanford News.
To counteract any chances of contaminating other places around our solar system, Hubbard suggests scientists could implement “combinations of chemical cleaning, heat sterilization, applying reduction credit for time spent in the highly sterilizing space radiation environment and clever mechanical systems” that have already been shown to be effective.
For instance, for NASA Martian Sample Return mission, a part of the agency’s Perseverance Rover initiative set to launch this year, have already been decontaminated using extremely high temperatures.
But that still leaves germy humans.
“Spacesuits can leak or ‘blow out,’ potentially releasing all manner of earthly microbes and contaminating the surface for any future science missions,” Hubbard said.
“Humans obviously cannot be cleaned like robots, so much more attention to spacesuits, human habitats and using robots as assistants is required,” he added.
There’s somewhat of a precedent when it comes to the Moon, he pointed out. The quarantine requirements for Apollo astronauts was eliminated relatively quickly in the 1970s once we found out the Moon posed no risk of contamination.
But that doesn’t mean we shouldn’t handle the samples from Mars with extreme caution.
A team of MIT researchers are suggesting that we could use a “dynamic orbital slingshot” to get an up-and-close look at interstellar objects — or, in other words, they want to send tiny satellites screaming through space to chase space rocks from beyond our star system.
It’s a far-out concept that’s even grabbed the attention of NASA. The project has secured proof-of-concept funding from the NASA Innovative Advanced Concepts (NIAC) Program, an incubator for radically futuristic concepts such as turning a crater on the far side of the Moon into a giant radio telescope.
Interstellar objects have been a fascinating and relatively recent addition to scientific inquiry. In particular, space rock Oumuamua, first spotted in 2017, and 2I/Borisov, spotted by amateur astronomer Gennadiy Borisov last year, have puzzled astronomers due to their extremely unusual trajectories, leading them to believe they arrived from a neighboring star system.
“There are a lot of fundamental challenges with observing [interstellar objects] from Earth — they are usually so small that light from the sun needs to illuminate it in a certain way for our telescopes to even detect it,” said Richard Linares, assistant professor in the Department of Aeronautics and Astronautics (AeroAstro) at MIT who came up with the idea, in a statement.
“They are traveling so fast that it’s hard to pull together and launch a mission from Earth in the small window of opportunity we have before it’s gone,” Linares explained. “We’d have to get there fast, and current propulsion technologies are a limiting factor.”
To get over these limitations, Linares suggests using a series of “static satellites” that each use “solar sail” technology — using only radiation of the Sun as propulsion.
This constellation of space buoys could then jump into action, releasing stored energy as well as using the gravitational pull of the sun to slingshot themselves after interstellar objects once they’ve been detected.
But they won’t attempt to stop when they get to these elusive extragalactic visitors.
“Flyby missions tend to be easier because they don’t require you to slow down — you fly past the object and try to get as many pictures as you can in that window,” Linares said.
“Studying an interstellar body close-up would revolutionize our understanding of planet formation and evolution,” professor of planetary sciences Benjamin Weiss, who is also working on the project, said in the statement.
The slingshots could even allow us to study the feasibility of sending objects to other solar systems, according to Weiss.
NASA's Lucy asteroid mission already faced a busy itinerary with seven different space-rock targets. Now, the team has discovered that one of those asteroids has a tiny companion.
The realization came thanks to the Hubble Space Telescope, which the team first recruited in 2018 to study a space rock called Eurybates. Like several of the other Lucy mission targets, Eurybates belongs to a group of asteroids known as Trojans, which occupy about the same orbit around the sun as Jupiter but cluster ahead of or behind the gas giant. Scientists had wondered whether Eurybates might have a companion, but combing through those 2018 Hubble images came up empty — until the researchers revisited the data in November 2019 and saw something.
"We asked for more Hubble time to confirm, and they gave us three tries," Keith Noll, Lucy project scientist at NASA's Goddard Space Flight Center in Maryland and a co-discoverer of the Eurybates satellite, said in a statement. "In the first two observations in December we didn't see anything, so we began to think we might be unlucky. But on the third orbit, there it was." That third orbit came in early January.
Scientists working on the Lucy mission hope to get another look at the satellite next month, when it comes back into Hubble's view for the first time since the discovery was confirmed in January. In the meantime, they are focused on using what data they have to pin down the satellite's orbit around Eurybates, which should increase the odds of successfully observing it during the next attempt.
What the researchers know so far suggests that the newly identified space rock is truly tiny: because the object is more than 6,000 times fainter than Eurybates, the satellite is likely less than 0.6 miles (1 kilometer) across, according to the statement.
The scientists on the Lucy mission hope that the newly discovered satellite — and the rest of the mission's Trojan tour — will help them understand how the solar system came to look the way it does. The Trojans are likely crumbs that slipped away during the formation of the gas giants and became trapped in these pockets of orbital stability, which means these space rocks should hold clues to the early days of the solar system.
A diagram of Lucy's itinerary among the Trojan asteroids that trail and lead Jupiter. (Image credit: Southwest Research Institute)
Eurybates and its tiny companion may also be two pieces of a formerly larger space rock, the scientists suspect, which means studying the pair could help scientists understand what happens during solar system collisions.
"There are only a handful of known Trojan asteroids with satellites, and the presence of a satellite is particularly interesting for Eurybates," Thomas Statler, Lucy Program Scientist at NASA headquarters in Washington, said in the statement. "It's the largest member of the only confirmed Trojan collisional family — roughly 100 asteroids all traceable to, and probably fragments from, the same collision."
The discovery should not affect the plan for Lucy, according to NASA, although the team behind the mission will be evaluating the situation to be sure the spacecraft won't accidentally slip too close to the rock and smash itself to bits.
A spacecraft that died in 2017 is still providing insights about Saturn, the planet it studied up close for 13 years.
NASA's Cassini spacecraft helped scientists to discover why Saturn's upper atmosphere is so hot, which puzzled planetary scientists for decades since the planet is too far from the sun to receive our star's heat. But, using old data from Cassini, scientists are closer to solving this mystery.
This new work, which was conducted by NASA and the European Space Agency and led by Zarah Brown, a graduate student at the University of Arizona's Lunar and Planetary Laboratory, suggests that it's auroras that are heating up Saturn's atmosphere. These auroras are triggered by the constant stream of charged particles from the solar wind, which interacts with charged particles that flow from Saturn's moons and creates electric currents.
This insight not only helps scientists understand what is going on at Saturn, but perhaps also at gas giant planets in general. Jupiter, Neptune and Uranus all have strangely hot upper atmospheres as well. There are also numerous exoplanet gas giants far outside of our solar system that may exhibit similar behavior.
"The results are vital to our general understanding of planetary upper atmospheres, and are an important part of Cassini's legacy," study co-author Tommi Koskinen, a member of Cassini's Ultraviolet Imaging Spectrograph instrument team, said in a statement from NASA's Jet Propulsion Laboratory.
Researchers previously used Cassini data to build a map of the temperature and density of Saturn's upper atmosphere, which was not well known before the spacecraft arrived at the planet in 2004. In this study, this map helped scientists to study how electric currents from Saturn's auroras heats the planet's upper atmosphere, generating the solar wind. The solar wind, in turn, distributes energy from the poles (where the auroras are located) towards the equator. That energy then heats the equator to twice the temperatures than could be generated from the sun's heat.
It's common for archival data from spacecraft like Cassini to continue providing new insights long after the craft are no longer operational. This particular dataset came from Cassini's final few months at Saturn when it did 22 very close orbits of the gas giant before deliberately hurling itself into the planet on Sept. 15, 2017 (to prevent possible Earthly contamination of Saturn's icy moons, which could host microbial life.)
For six weeks, Cassini examined bright stars in the constellations Orion and Canis Major, watching as the stars rose and set behind Saturn. By observing the shifting starlight, scientists were able to learn more about the density of Saturn's atmosphere. Since density decreases with altitude, the rate of decrease is dependent on temperature, allowing scientists to estimate temperatures in Saturn's upper atmosphere.
Cassini's observations showed the temperatures peaking around the auroras, in turn providing evidence that it is electric currents are what Saturn's upper atmosphere so hot. Wind speeds on Saturn were also determined using density and temperature measurements.
1. The Mass Fleet Encounter of UFOs over Washington D.C. Capital (1952)
2. Mufon Case: 108659 In the sky above Everett,Washington 5/7/2020
Long Description of Sighting Report
Myself and several others were enjoying the beach when these unknown objects kept appearing and reappearing with no sound, almost as if fading in and out from another dimension or cloaking or optical illusions. Not sure if it was military or not. It did not appear to be any aircraft I am familiar with but who knows. I just know I am unable to define what we all saw. We are near the Snohomish County/Paine Field airport and near Everett navy base. https://mufoncms.com/cgi-bin/report_h...
3. MUFON Report Case Number 104601
A California witness at Menlo Park On Nov 20, 2019 spotted Blimp/ oval-like lights. “I spotted a bright large blimp/oval like UFO. It was moving interestingly slow for a large object the Witness stated. The features were described as being strong white lights with a hint of yellow lights and a red blinking light at the bottom center of the craft. It appeared to have had a bulge on the top center. The front of the craft had a more rounded curve while the back had a sharper and smaller curve, almost egg-shaped. It took about 8 minutes to move NE to South. and was observed for 40 mins,
4. MUFON Report Case 103929 -
An Iowa witness at Cedar Rapids reported seeing a white light with rapidly flashing red and green lights on October 8,2019 at 9:58 pm. according to testimony. The witness stated “Out of our front window I saw a white light with rapidly flashing red and green lights all around it. It was moving slowly from the East and then seemed to pause. Here is the video we have on this.
Gareth Dorrian, Post Doctoral Research Fellow in Space Science, University of Birmingham and Ian Whittaker, Lecturer in Physics, Nottingham Trent University
The Historiesby Herodotus (484BC to 425BC) offers a remarkable window into the world as it was known to the ancient Greeks in the mid fifth century BC. Almost as interesting as what they knew, however, is what they did not know. This sets the baseline for the remarkable advances in their understanding over the next few centuries – simply relying on what they could observe with their own eyes.
Herodotus claimed that Africa was surrounded almost entirely by sea. How did he know this? He recounts the story of Phoenician sailors who were dispatched by King Neco II of Egypt (about 600BC), to sail around continental Africa, in a clockwise fashion, starting in the Red Sea. This story, if true, recounts the earliest known circumnavigation of Africa, but also contains an interesting insight into the astronomical knowledge of the ancient world.
The voyage took several years. Having rounded the southern tip of Africa, and following a westerly course, the sailors observed the Sun as being on their right hand side, above the northern horizon. This observation simply did not make sense at the time because they didn’t yet know that the Earth has a spherical shape, and that there is a southern hemisphere.
1. The planets orbit the sun
A few centuries later, there had been a lot of progress. Aristarchus of Samos (310BC to 230BC) argued that the Sun was the “central fire” of the cosmos and he placed all of the then known planets in their correct order of distance around it. This is the earliest known heliocentric theory of the solar system.
Unfortunately, the original text in which he makes this argument has been lost to history, so we cannot know for certain how he worked it out. Aristarchus knew the Sun was much bigger than the Earth or the Moon, and he may have surmised that it should therefore have the central position in the solar system.
Nevertheless it is a jawdropping finding, especially when you consider that it wasn’t rediscovered until the 16th century, by Nicolaus Copernicus, who even acknowledged Aristarchus during the development of his own work.
2. The size of the moon
One of Aristarchus’ books that did survive is about the sizes and distances of the Sun and Moon. In this remarkable treatise, Aristarchus laid out the earliest known attempted calculations of the relative sizes and distances to the Sun and Moon.
It had long been observed that the Sun and Moon appeared to be of the same apparent size in the sky, and that the Sun was further away. They realised this from solar eclipses, caused by the Moon passing in front of the Sun at a certain distance from Earth.
Also, at the instant when the Moon is at first or third quarter, Aristarchus reasoned that the Sun, Earth, and Moon would form a right-angled triangle.
As Pythagoras had determined how the lengths of triangle’s sides were related a couple of centuries earlier, Aristarchus used the triangle to estimate that the distance to the Sun was between 18 and 20 times the distance to the Moon. He also estimated that the size of the Moon was approximately one-third that of Earth, based on careful timing of lunar eclipses.
A 10th century reproduction of a diagram by Aristarchus showing some of the geometry he used in his calculations. (Image credit: Wikipedia, CC BY-SA)
While his estimated distance to the Sun was too low (the actual ratio is 390), on account of the lack of telescopic precision available at the time, the value for the ratio of the size of the Earth to the Moon is surprisingly accurate (the Moon has a diameter 0.27 times that of Earth).
Today, we know the size and distance to the moon accurately by a variety of means, including precise telescopes, radar observations and laser reflectors left on the surface by Apollo astronauts.
3. The Earth's circumference
Eratosthenes (276BC to 195 BC) was chief librarian at the Great Library of Alexandria, and a keen experimentalist. Among his many achievements was the earliest known calculation of the circumference of the Earth. Pythagoras is generally regarded as the earliest proponent of a spherical Earth, although apparently not its size. Eratosthenes’ famous and yet simple method relied on measuring the different lengths of shadows cast by poles stuck vertically into the ground, at midday on the summer solstice, at different latitudes.
The Sun is sufficiently far away that, wherever its rays arrive at Earth, they are effectively parallel, as had previously been shown by Aristarchus. So the difference in the shadows demonstrated how much the Earth’s surface curved. Eratosthenes used this to estimate the Earth’s circumference as approximately 40,000km. This is within a couple of percent of the actual value, as established by modern geodesy (the science of the Earth’s shape).
Later, another scientist called Posidonius (135BC to 51BC) used a slightly different method and arrived at almost exactly the same answer. Posidonius lived on the island of Rhodes for much of his life. There he observed the bright star Canopus would lie very close to the horizon. However, when in Alexandria, in Egypt, he noted Canopus would ascend to some 7.5 degrees above the horizon.
Given that 7.5 degrees is 1/48th of a circle, he multiplied the distance from Rhodes to Alexandria by 48, and arrived at a value also of approximately 40,000km.
4.The first astronomical calculator
The world’s oldest surviving mechanical calculator is the Antikythera Mechanism. The amazing device was discovered in an ancient shipwreck off the Greek island of Antikythera in 1900.
The device is now fragmented by the passage of time, but when intact it would have appeared as a box housing dozens of finely machined bronze gear wheels. When manually rotated by a handle, the gears span dials on the exterior showing the phases of the Moon, the timing of lunar eclipses, and the positions of the five planets then known (Mercury, Venus, Mars, Jupiter, and Saturn) at different times of the year. This even accounted for their retrograde motion – an illusionary change in the movement of planets through the sky.-
We don’t know who built it, but it dates to some time between the 3rd and 1st centuries BC, and may even have been the work of Archimedes. Gearing technology with the sophistication of the Antikythera mechanism was not seen again for a thousand years.
Sadly, the vast majority of these works were lost to history and our scientific awakening was delayed by millennia. As a tool for introducing scientific measurement, the techniques of Eratosthenes are relatively easy to perform and require no special equipment, allowing those just beginning their interest in science to understand by doing, experimenting and, ultimately, following in the foot steps some of the first scientists.
One can but speculate where our civilisation might be now if this ancient science had continued unabated.
Orbiting its sun-like star every four days, the giant could play a role in sparking life on rocky worlds.
It appears that planetary heavyweight Kepler-88 c, which orbits the sunlike star Kepler-88, is no longer the gravitational god of the exoplanets in the Kepler-88 system, according to a new study. A new world was recently confirmed in the system, tipping the scales at three times the mass of solar system giant Jupiter.
Led by a team of astronomers at the University of Hawaii Institute for Astronomy (UH IfA), the research — which is based on six years of data taken from W.M. Keck Observatory on Mauna Kea in Hawaii — uncovered a previously undetected third exoplanet orbiting Kepler-88. Named Kepler-88 d, the newfound planet completes slow-moving laps around its host star every four years.
It was the keen telescopic eye of the High-Resolution Echelle Spectrometer (HIRES) instrument affixed to the 10-meter Keck I telescope that revealed to lead author Lauren Weiss, a Beatrice Watson Parrent Postdoctoral Fellow at UH IfA, her team had made a game-changing discovery.
"At three times the mass of Jupiter, Kepler-88 d has likely been more influential in the history of the Kepler-88 system than the so-called King, Kepler-88 c, which is only one Jupiter mass," Weiss said. "So maybe Kepler-88 d is the new supreme monarch of this planetary empire — the empress."
The Kepler-88 system, which lies over 1,200 light-years away from Earth in the constellation of Lyra, the harp, has drawn attention from astronomers ever since the discovery of its first two exoplanets in 2013. The observations revealed that Kepler-88 c, the more massive of the two exoplanets, and its gaseous sibling Kepler-88 b appear to interact around their host star in a striking way.
For one, the "sub-Neptune" exoplanet Kepler-88 b completes an orbital lap every 11 days, almost exactly half the time it takes Kepler-88 c to finish a circuit. Since Kepler-88 c, the outer planet, is 20 times more massive than Kepler-88 b, the larger planet's gravity affects the orbit of the inner world when the two planets pass each other in orbit. In other words, for every two orbits Kepler-88 b achieves, it gets "pumped" by its gigantic sibling, according to a statement from the Keck Observatory.
Kepler-88 d has a mass three-times that of our solar system's Jupiter (Image credit: W. M. Keck Observatory/Adam Makarenko )
What astronomers have observed between the alien worlds is a bizarre and striking dynamic known as mean motion resonance; two orbits that seem to behave in a clockwork fashion — it's energetically efficient, according to Weiss and her team, and similar to a parent pushing a child on a swing.
It was with the help of NASA's now-defunct Kepler Space Telescope (which officially ceased operations on Oct. 30, 2018 when the spacecraft ran out of fuel), that the orbital timing of the planets in the Kepler-88 system was gained with precision. Kepler was able to use the art of transits — an exoplanet detection technique in which astronomers watch for planets passing in front if their host stars — to gain the readings, known as transit timing variations.
Although transit timing variations (TTVs) have been detected in a few dozen planetary systems, Kepler-88 b has some of the largest timing variations. With transits arriving up to half a day early or later than predicted, the system is known as "the King of TTVs," the researchers said in the statement.
Heading back to our solar system, Jupiter holds the cards when it comes to being the king of gravitational influence. Twice the mass of ringed giant Saturn and 300 times heftier than Earth, even the slightest movement is felt by the other worlds of cosmic neighborhood: from Mars to the team of comets that — according to observations of comet 46P/Wirtanen — delivered water to a parched young Earth billions of years ago.
Whether Kepler-88 d also has the influence to direct water-bearing comets to newly-developed rocky worlds is of importance to the team of researchers, Weiss said.
Gemma Lavender is the author of Quantum Physics in Minutes (Quercus, 2017) and Haynes Owner's Workshop Manual: Milky Way (Haynes Publishing, 2019), among other books.
Earth is surrounded by thousands of Near-Earth Objects, a few of these are potentially hazardous, and fewer still which are classified as planet killers. An impact from the latter carries implications as severe the name suggests. Clearly, we need a method of diverting such objects. In fact, it isn’t hyperbole to say, the survival of our species may depend on it.
News stories about massive objects skirting close to Earth are pretty common in the media, as a timely example, in April news organisations across the globe reported a mile-wide asteroid passing with just 3.9 miles of our planet. Fortunately, the rock identified as (52768) 1998 OR2, posed no real impact threat.
(52768) 1998 OR2 passed within 3.9 miles of Earth last month. A near miss, but it no-means the only NEO out there. @AreciboRadar/Twitter/PA
Yet, our planet is scarred with the evidence of previous collisions with such objects. The most frequently thought of example is the impact that wiped out the dinosaurs 66-million-years-ago, the scale of which can be seen by examining the Chicxulub crater centred on the Yucatán Peninsula in Mexico.
The dinosaur destroying asteroid is estimated to have been around 10–15 km in width, but the crater it created was 150 km in diameter and the debris in threw into the atmosphere blacked out the Sun for months as well as triggering massive tidal waves which battered the entire continent of America and other deadly secondary effects.
Even looking beyond the surface of our own planet, the Moon’s geology is strongly shaped by a history of asteroid impacts, as are the faces of other planets in the solar system.
Animation depicts a mapping of the positions of known near-Earth objects The animation depicts a mapping of the positions of known near-Earth objects (NEOs) at points in time over the past 20 years and finishes with a map of all known asteroids as of January 2018. Asteroid search teams supported by NASA’s NEO Observations Program have found over 95 per cent of near-Earth asteroids currently known. There are now over 18,000 known NEOs and the discovery rate averages about 40 per week. (NASA/JPL-Caltech)
The truth is the Earth exists within the vicinity of thousands of Near Earth Objects (NEOs), many of which carry the risk of colliding with our planet. If one of these asteroids — referred to as Potentially Hazardous Objects (PHOs) —did strike our planet, it could cause devastating effects including massive property and infrastructure damage, as well as significant loss of life. Within the population of PHOs is a smaller population of objects which could, much like the asteroid that wiped out the dinosaurs and 75% of all other animal life, trigger a major extinction event.
It should be abundantly clear that developing a method of mitigating the impact of one of these objects by knocking off its collision course is imperative. Asteroid mitigation has been identified as one of NASA’s ‘Space Technology Grand Challenges’ — problems that require cutting -edge scientific solutions. Indeed, many other institutions across the globe are working on their own mitigation strategies, each of which comes with its own unique pros and cons.
Should the possibility of an asteroid impact arise, the governments of Earth will be faced with a stark choice. Depending on a number of factors and characteristics they will have to choose between an instantaneous approach or a more gradual method .
Some of these methods and their potential successes and failures are listed below, starting with the more extreme, blunt solutions to asteroid mitigation.
The direct approach
There is probably nothing that constitutes ‘direct approach’ more than tossing a nuclear explosion at a problem. Thus, it may come as no surprise that many research hours have been devoted to devising a scheme in which an asteroid can be diverted with the aid of a nuclear weapon.
The stark truth of the matter is, if the NEO is spotted on a collision course with Earth with less than 10 years warning, direct intercept with such a device may well be our only hope of diversion. Further to this, these ‘short lead time’ encounters are currently the most likely probable scenarios involving Earth and an encounter with a PHO.
(NEOSheild 2/ EU Horizons)
Hitting an asteroid with a nuclear weapon obviously provides mitigation by imparting energy to the object to divert it, even if only slightly. Another way of doing this is by slamming the PHO with another object. Instead of imparting nuclear energy, this kinetic impactor is a spacecraft that hits the PHO at a high velocity transferring momentum to it changing its velocity and hopefully diverting its course.
Interestingly, this method requires the use of a reconnaissance craft to first map the characteristics of the PHO, such as its orbit, size, shape and rotation, even its chemical make-up so that the impact can be perfectly calibrated. One kinetic impactor system currently being researched is the NEOShield-2, which involves the reconnaissance craft launching together with the impactor. The two craft, initially stacked together, will separate with the reconnaissance craft hopefully reaching the asteroid first, and the impactor following through when details are collected.
In March last year, NASA unveiled early plans for a ‘best of both worlds’ mission that unites a kinetic impactor and nuclear device for the purpose of asteroid diversion. The Hypervelocity Asteroid Intercept Vehicle (HAIV) mission craft consists of a fore-body kinetic impactor which smashes into the asteroid, and an aft-body which when deposits a nuclear charge. The beauty of this arrangement is that if the impactor can create a crater in the asteroid, the nuclear blast will occur beneath the surface of the NEO, imparting more energy than a glancing blow could.
An artist’s interpretation of how the Hypervelocity Asteroid Intercept Vehicle (HAIV) will divert an asteroid (EADS)
Both of these missions are still at least ten years from reaching a viable testing-stage. And there is another, deeper problem.
The danger of any direct impact mission is that it could fragment the asteroid in question, especially as some asteroids are merely a loose conglomeration of smaller bodies. This could result in Earth being bombarded with a multitude of meteors — each causing untold destruction. Even worse, if the NEO in question has a core of pure iron, even a nuclear device/ kinetic impactor double-punch is unlikely to divert it.
This is the case if we have little notification of an asteroid’s impact — less than ten years, what if space agencies are granted more time to divert the PHO?
Diverting asteroids — the gentle way
Methods that require a long lead time tend to be more gentle than short-lead time techniques, and interestingly, also tend to exploit our understanding of physics and energy way beyond that of kinetic energy alone.
Perhaps the most well-known long-lead-time diversion method involves using gravitational energy to alter the orbit of a NEO. It’s also the most ‘gentle’ of even the long-lead-time methods, not even requiring contact with the asteroid.
A gravity tractor slowly influences the orbit of a NEO. It is a method that requires a long-lead-time. (NASA)
The idea is to place a spacecraft in orbit alongside a PHO over a period of many years or even decades. The gravitational influence of the gravity tractor gradually pulls the asteroid off course, thus preventing a close encounter with the earth. The gravity tractor method would work on asteroids of all compositions, and shapes, even if they are collections of smaller bodies, loosely gravitationally bound. There is a limit to the size of an asteroid that could be gravitationally pulled, however, making this a technique that is unlikely to tug a planet killer.
The theory behind gravity tractors is so robust and the control it allows is so precise, that it has even been suggested that the method could be used to place asteroids in positions where they could be beneficial for humanity — allowing them to be used for research or even commercial purposes.
A less ‘contactless’ version of the gravity tractor approach, involves using an actual physical tether to divert the asteroid to a higher orbit. The tethered object would be smaller than the NEO and could either be a spacecraft launched from earth, or another NEO. The concept behind this method is that attaching the larger body to a smaller one changes the centre of mass of the body and thus adjusts its orbit.
One potential drawback of the system is that is likely to require some pretty intensive surface operations, especially if the tether is to be attached to two NEOs. It also carries the risk of the tether becoming tangled, meaning before any operation was undertaken the motion of the PHO would have to be known precisely.
Though the message is clear if the paint method is going to work, researchers may want to consider a more even coating. (Robert Lea)
One of the most ‘out there’ ideas to divert an asteroid on course to strike the Earth involves spraying a thin layer of powdered paint on one side of an asteroid and allowing radiation from the Sun to alter the asteroid’s orbital path. The paint coating changes the amount of radiation reflected by the asteroid’s surface. This leads to unequal heating within the body, and thermal particles being ejected more strongly on one-side than the other. As a result, a strong net force is created which over the course of several years can shift the asteroid’s orbit.
Again, these methods which are just the tip of the iceberg in terms of mitigation strategies, are still very much in the developmental phase, and moving them into the test stages could be a matter of some urgency.
It’s a matter of ‘when’ not ‘if’
“An asteroid collision would be something against which we have no defence… This is not science fiction; it is guaranteed by the laws of physics and probability.”
— Stephen Hawking, Brief Answers to Big Questions, [2018].
If 2020 teaches humanity nothing else it should impart the lesson that we are simply not ready to deal with some of the hazards that nature can and will throw at us. If the strategies put in place to deal with a potential pandemic strike us as slap-shot, underwhelming and inadequate, the provisions taken thus far to prevent an asteroid strike fall considerably short of even this.
The only real hope we have of diverting a PHO as things currently stand is spotting it well in advance and getting a satisfactorily long-lead time. But still, there is very little in the way of infrastructure in place to deal with such an eventuality.
Just as historians may one day look back at the MERS and SARS outbreaks as stark warnings of a coronavirus pandemic that governments around the world failed to take heed of, so too they may consider the close brush with 99942 Apophis as a warning to prepare for asteroid incursion.
The NEO with a diameter of 370 meters caused concern in December 2004 when observations indicated there was a 2.7% chance that on a future sweep past our planet in April 2029, it would strike the planet. Estimations changed between 2004 and 2006, first appearing that 99942 Apophis would miss both the Earth and the Moon, with the possibility that during the 2029 encounter it would pass through a gravitational keyhole, that would result in it impacting the planet in 2036.
Fortunately, by 2008 it had been determined that the asteroid would both miss the Earth and the 1km gravitational keyhole that would shift it onto a collision course in 2036. As it currently stands, 99942 Apophis has a 1 in 150,000 chance of colliding with our planet in 2068. Pretty slim. But, unfortunately, 99942 Apophis is hardly the only PHO out there, and there are many that we have yet to discover.
The trail in the key over Russia left by the Chelyabinsk Meteor. ( Alex Alishevskikh/ CCbySA2.0)
The Chelyabinsk meteor provides a stark example of such an unknown object. The object with a 20-meter diameter entered Earth’s atmosphere over Russia on 15th February 2013. Due to its high velocity and shallow entry angle, the meteor broke apart in an airburst at around 30 km over the Chelyabinsk Oblast. The energy it released was so potent that the airburst was brighter than the Sun, and could be seen from a distance of 62 miles away.
Over 1,500 people were injured as a result of the blast.
Should it have actually hit the surface of our planet, impacting in a region with a population of 3.5 million people, it would have been the equivalent of the detonation of around 500 kilotonnes of TNT — around 33 times the energy released by the detonation of the atomic bomb that devastated Hiroshima.
We had literally no idea it was there. We still don’t know where it came from.
The real key to asteroid mitigation is increased investment in space science and infrastructure. Developing mitigation strategies isn’t enough, as Chelyabinsk shows, we need to also focus on detection methods.
Hopefully, this is a lesson that won’t be learned in hindsight, because as Hawking predicted in his final work shortly before his death in 2018, this is inevitable. And as estimates made using Earth’s history as a guide, collisions with an object of the size of 99942 Apophis occur roughly once every 80,000 years. That means we are currently well-overdue.
Sources and Further Reading
Sugimoto. Y, Radice. G, Ceriotti. M, et al, Hazardous Near-Earth asteroid mitigation campaign planning based on uncertain information on fundamental asteroid characteristics, Acta Astronautica, [2014]
Foster. C, Bellerose. J, Mauro. D, et al, Mission concepts and operations for asteroid mitigation involving multiple gravity tractors, Acta Astronautica, [2013]
Lu. E, The Project B612 Concept, ARC, [2012]
Dearborn. D, 21st Century Steam for Asteroid Mitigation, ARC, [2012]
Spitale. J. N, Asteroid Hazard Mitigation Using the Yarkovsky Effect, Science, [2012]
Belton. M. J. S, Morgan T. H, Samarasinha N. H, Yeomans D. K, Mitigation of Hazardous Comets and Asteroids, Cambridge University Press.
Hawking. S, Brief Answers to Big Questions, Hodder & Stoughton, [2018].
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Ik ben Pieter, en gebruik soms ook wel de schuilnaam Peter2011.
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