Posted on 04/04/2022 8:25:27 AM PDT by Red Badger
The signal detected by Kepler (l) and the Canada-France-Hawaii Telescope. (The University of Manchester)
An exoplanet a whopping 17,000 light-years from Earth has been found hiding in data collected by the now-retired Kepler Space Telescope.
It's the most distant world ever picked up by the planet-hunting observatory, twice the distance of its previous record. Fascinatingly, the exoplanet is almost an exact twin of Jupiter – of similar mass, and orbiting at almost the same distance as Jupiter's distance from the Sun.
Named K2-2016-BLG-0005Lb, it represents the first exoplanet confirmed from a 2016 data run that detected 27 possible objects using a technique called gravitational microlensing rather than Kepler's primary detection method. The discovery has been submitted to the Monthly Notices of the Royal Astronomical Society, and is available on preprint server arXiv.
"Kepler was never designed to find planets using microlensing so, in many ways, it's amazing that it has done so," said astronomer Eamonn Kerins of the University of Manchester.
The Kepler spacecraft was instrumental in blowing the field of exoplanet astronomy wide open. It launched in 2009, and spent nearly 10 years hunting for planets outside the Solar System, or exoplanets. During that time, its observations revealed over 3,000 confirmed exoplanets, and another 3,000 candidates.
Its technique is ingeniously and deceptively simple. Kepler stared at fields of stars, optimized for detecting the faint, regular dips in starlight that suggest an exoplanet is in orbit around a star. This is called the transit methodm, and it's good for finding larger nearby exoplanets orbiting close to their stars.
Microlensing is a little trickier, leveraging a quirk of gravity and a chance alignment. The mass of a body such as a planet creates a gravitational curvature of space-time around it. If that planet then passes in front of a star, the curved space-time basically acts like a magnifying glass that very faintly and briefly causes the starlight to brighten.
Gravitational microlensing is very good at finding exoplanets a long distance from Earth, orbiting their stars at quite large distances, down to very small planet masses. The most distant galactic exoplanet discovered to date was picked up by microlensing, an Earth-mass world 25,000 light-years away.
Since Kepler is optimized for detecting changes in starlight, a team of researchers led by the University of Manchester recently thought to look at the Kepler data for microlensing events, from an observing window over several months in 2016. They identified 27 events, five of which were entirely new, not yet identified in data from ground-based telescopes.
"To see the effect at all requires almost perfect alignment between the foreground planetary system and a background star," Kerins explained.
"The chance that a background star is affected this way by a planet is tens to hundreds of millions to one against. But there are hundreds of millions of stars towards the center of our galaxy. So Kepler just sat and watched them for three months."
One of the five events was K2-2016-BLG-0005Lb, and it looked promising for an exoplanet orbiting a star. So the team searched datasets from five ground-based surveys that were looking at the same patch of sky at the time Kepler was, to corroborate their signal.
They found that Kepler observed the signal slightly earlier, and for slightly longer, than the five ground-based surveys. This combined dataset allowed the team to determine that the exoplanet is around 1.1 times the mass of Jupiter, orbiting its star at a circular distance of 4.4 astronomical units. Jupiter's average distance from the Sun is 5.2 astronomical units.
"The difference in vantage point between Kepler and observers here on Earth allowed us to triangulate where along our sight line the planetary system is located," Kerins said.
"Kepler was also able to observe uninterrupted by weather or daylight, allowing us to determine precisely the mass of the exoplanet and its orbital distance from its host star. It is basically Jupiter's identical twin in terms of its mass and its position from its Sun, which is about 60 percent of the mass of our own Sun."
Although we don't currently have more data on the system, this finding has implications for our search for extraterrestrial life. There's evidence to suggest that Jupiter may have played an instrumental role in the conditions that allowed Earth to emerge and thrive on Earth; finding Jupiter analogues orbiting distant stars could be a way to identify these conditions.
The fact that Kepler, an instrument not designed for microlensing, was able to make this sort of detection, bodes well for upcoming instruments that will be designed for microlensing. NASA's Nancy Grace Roman Space Telescope, scheduled to launch in the next five years, will be looking for microlensing events, as will ESA's Euclid, scheduled for a launch next year.
These detections could revolutionize our understanding of exoplanets.
"We'll learn how typical the architecture of our own solar system is," Kerins said. "The data will also allow us to test our ideas of how planets form. This is the start of a new exciting chapter in our search for other worlds."
The research has been submitted to the Monthly Notices of the Royal Astronomical Society and is available on arXiv.
X-O Planet PinGGG!...................
If its like Jupiter is there another like earth? We can send off all the greenies there.
That is the inference.
If not for Jupiter and the other Gas Giants, life on Earth would be totally different.....................
I hope we don’t lose all these wonderful things that are so complicated and expensive when society crashes. I hope somehow they can be preserved.
Too bad Kepler isn't around to learn about these discoveries with his telescope. Nonetheless, K2-2016-BLG-005Lb will follow Kepler's laws of planetary motion while orbiting its star.
I want physical proof of this exoplanet find and whether there is global warming on that planet. I suggest a mission that sends the all the leading climate change scientists to verify.
We may be entering into a new ‘Dark Age’ that may last a thousand years..................
As it appeared... 17,000 years ago. It might not even exist today.
The advances in science that we are seeing now will be the future’s arcane, occult knowledge. People will be like, “Do not anger the Sun by suggesting there are other Suns!” *mass slaughter erupts*
Your comment made be remember a Twilight Zone episode where a larger computer was hidden in a cave and its output [daily advice] allowed a small community of survivors of a nuclear war to survive.
A couple of outsiders came into town to claim they were in charge now of the towen which was inside their territory. They beat up the town leader after he resisted, told them they did not belong there and needed to leave. The antagonists in good party demonikraps fashion divided the people, fearful of beatings, against their wise leader, destroyed the computer and told the people they could eat the canned food that the leader warned (on advice of computer) was radioactive and would kill them. They all gorged themselves with the food ... and only the leader survived.
I still miss Pluto. If big balls of GAS can be considered ‘planets’ why can’t she? :(
Misogyny..................
There ya go...
Thanks Red Badger. Glad that Michelle Starr has that beat.
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LOL
Miss O’Gyny was one of my teachers in elementary school...
People be like that now, heh heh...
As it has been, so it will ever beeeeee.
https://www.ranker.com/list/inside-cult-of-pythagoras/nicky-benson
The demotion of Pluto was a political act by a supposedly scientific org, was a gratuitous and unnecessary action, carried out to belittle the US. IMHO of course. I'll stick with David Levy's view:
"To Pluto And Far Beyond" By David H. Levy, Parade, January 15, 2006 -- We don't have a dictionary definition yet that includes all the contingencies. In the wake of the new discovery, however, the International Astronomical Union has set up a group to develop a workable definition of planet. For our part, in consultation with several experienced planetary astronomers, Parade offers this definition: A planet is a body large enough that, when it formed, it condensed under its own gravity to be shaped like a sphere. It orbits a star directly and is not a moon of another planet.
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