27 March 2017
U Manchester Professor Brian Cox and ANU astronomer Dr. Brad Tucker. Credit: NASA
Courtesy Caltech / R. Hurt (IPAC)
Four Candidates For Planet 9 Located
ANU is launching a search for a new planet in our Solar System, inviting anyone around the world with access to the Internet to help make the historic discovery.
A concentrated three-day search for a mysterious, unseen planet in the far reaches of our own solar system has yielded four possible candidates. The search for the so-called Planet 9 was part of a real-time search with a Zooniverse citizen science project, in coordination with the BBC’s Stargazing Live broadcast from the Australian National University’s Siding Spring Observatory.
Researcher Brad Tucker from ANU, who led the effort, said about 60,000 people from around the world classified over four million objects during the three days, using data from the SkyMapper telescope at Siding Spring.
He and his team said that even if none of the four candidates turn out to be the hypothetical Planet 9, the effort was scientifically valuable, helping to verify their search methods as exceptionally viable.
“We’ve detected minor planets Chiron and Comacina, which demonstrates the approach we’re taking could find Planet 9 if it’s there,” Tucker said. “We’ve managed to rule out a planet about the size of Neptune being in about 90 per cent of the southern sky out to a depth of about 350 times the distance the Earth is from the Sun.
SAMI, a new multi-object integral field spectrograph at Siding Spring Observatory, which was used to look for the hypothetical Planet 9. Credit: Dilyar Barat via Twitter.
Anyone who helps find the so-called Planet 9 will work with ANU astronomers to validate the discovery through the International Astronomical Union.
Researchers from Australian National University pose with BBC astronomers Chris Lintott, Brian Cox and Dara O’Brien. Credit: ANU.
ANU astrophysicist Dr Brad Tucker is leading the project, which is being launched by Professor Brian Cox during a BBC Stargazing Live broadcast from the ANU Siding Spring Observatory.
“We have the potential to find a new planet in our Solar System that no human has ever seen in our two-million-year history,” said Dr Tucker from the ANU Research School of Astronomy and Astrophysics.
Dr Tucker said astronomers had long discussed the likelihood of a ninth planet on the outer edges of the Solar System, but nothing had been found yet.
“Planet 9 is predicted to be a super Earth, about 10 times the mass and up to four times the size of our planet. It’s going to be cold and far away, and about 800 times the distance between Earth and the sun. It’s pretty mysterious,” he said.
The ANU project will allow citizen scientists to use a website to search hundreds of thousands of images taken by the ANU SkyMapper telescope at Siding Spring.
SkyMapper will take 36 images of each part of the southern sky, which is relatively unexplored, and identify changes occurring within the Universe.
Finding Planet 9 involves citizen volunteers scanning the SkyMapper images online to look for differences, Dr Tucker said.
“It’s actually not that complicated to find Planet 9. It really is spot the difference. Then you just click on the image, mark what is different and we’ll take care of the rest,” Dr Tucker said.
He said he expected people to also find and identify other mystery objects in space, including asteroids, comets and dwarf planets like Pluto.
“If you find an asteroid or dwarf planet, you can’t actually name it after yourself,” Dr Tucker said.
“But you could name it after your wife, brother or sister. We need to follow all of the rules set by the International Astronomical Union.”
Dr Tucker said modern computers could not match the passion of millions of people.
“It will be through all our dedication that we can find Planet 9 and other things that move in space,” he said.
Co-researcher and Head of SkyMapper Dr Chris Wolf said SkyMapper was the only telescope in the world that maps the whole southern sky.
“Whatever is hiding there that you can’t see from the north, we will find it,” Dr Wolf said.
From 28 to 30 March at 8pm London time, BBC Stargazing Live hosted by Professor Cox and comedian Dara O Briain is expected to be viewed by around five million people.
The ABC [Australian, not U.S.] will broadcast an Australian Stargazing Live program from Siding Spring from 4 to 6 April, hosted by Professor Cox and Julia Zemiro.
SkyMapper is a 1.3-metre telescope that is creating a full record of the southern sky for Australian astronomers.
People can to participate in the ANU citizen science project to search for Planet 9 at http://www.planet9search.org
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