On the trail of new planets

Sep 29, 2011
Artist's impression of an eclipsing binary star system using original material from NASA/ESA/Bacon.

(PhysOrg.com) -- A project in which volunteers hunt online for new planets NASA may have missed is publishing its first results which show some remarkable finds.

Planethunters.org, which was set up by Oxford University physicists, working with colleagues at Yale University and the Adler Planetarium, has enabled over 45,000 armchair astronomers to find candidates for new by searching data from the Kepler mission.

Reporting on just the first month of the project, which was launched in December 2010, researchers believe there is a ‘95% chance or greater’ that have already spotted two new exoplanets NASA originally discarded: other finds include a previously unknown eclipsing binary star system.

‘Kepler's mission is to work out what kind of worlds might be out there - that's why it's so important we rescue those that have slipped through the net,’ Chris Lintott of Oxford University’s Department of Physics, one of the scientists leading planethunters.org, told me.

The Kepler telescopes detect by recording tiny changes in the brightness of . This dimming is caused by planets crossing in front of them. Volunteers visiting planethunters.org sort through thousands of images of stars searching for examples of these dimming events (known as 'transits') which ’s small team of experts may have missed.

The project builds on a series of highly successful Oxford-led citizen science projects, such as Galaxy Zoo, Old Weather, and most recently Ancient Lives, which have shown that ordinary web users can beat computer algorithms at spotting patterns and interesting phenomena.

Carolyn Bol, from Helensburgh in Scotland, is one of the planethunters.org volunteers who has made a discovery that will soon see her name appear on a scientific paper.

‘The fact that all that data is readily available to everyone makes the ‘hunting’ a bit of a game thanks to all of those connected remotely from the comfort of their home,’ she explains. ‘I have a full time job as an optometrist so I really enjoy having this hobby where I spend time hunting for planets when I have some spare time.’

It was while sorting through images of stars that Carolyn made her discovery:

‘The moment I saw the pattern I screamed “A PLANET !” just because all the light curves I was classifying were very similar, some pulsating etc but there were no distinctive transits until that pattern appeared and I was sure I was watching a planet. I marked the transits, I favourite it and went to discuss it.’

It led to some interesting discussions with her work colleagues, such as whether you should name a planet when it might have been named already by an alien civilisation.

In fact Carolyn’s planetary candidate would later be found to be not an alien world passing in front of a star but something almost as exotic: an eclipsing binary system containing two stars in which one star’s orbit sees it pass in front of its companion.

It just goes to show that when you unleash an army of citizen scientists part of the fun is not knowing what they will turn up.

‘I think it's incredible that only 16 years after the first were discovered around other stars, it's now possible to find candidates using nothing but a web browser,’ Chris tells me.

‘With new data being released just last week, there are plenty more surprises hidden in the data for planet hunters to find.’

Explore further: Bad weather delays SpaceX launch with 3-D printer

add to favorites email to friend print save as pdf

Related Stories

Volunteers to hunt for 'lost planets'

Dec 20, 2010

(PhysOrg.com) -- The public are being asked to help Oxford University astronomers find planets orbiting other stars which may have been 'lost' in the data from over 100,000 stars. Volunteers could even find ...

Citizen scientists join search for Earth-like planets

Dec 16, 2010

(PhysOrg.com) -- Web users around the globe will be able to help professional astronomers in their search for Earth-like planets thanks to a new online citizen science project called Planet Hunters that launches ...

New planets feature young star and twin Neptunes

Jun 15, 2011

(PhysOrg.com) -- An international team, including Oxford University scientists, has discovered ten new planets. Amongst them is one orbiting a star perhaps only a few tens of million years old, twin Neptune-sized ...

Recommended for you

Internet moguls Musk, Bezos shake up US space race

22 hours ago

The space race to end America's reliance on Russia escalated this week with a multibillion dollar NASA award for SpaceX's Elon Musk and an unexpected joint venture for Blue Origin's Jeff Bezos.

Winter in the southern uplands of Mars

Sep 19, 2014

Over billions of years, the southern uplands of Mars have been pockmarked by numerous impact features, which are often so closely packed that they overlap. One such feature is Hooke crater, shown in this ...

Five facts about NASA's ISS-RapidScat

Sep 19, 2014

NASA's ISS-RapidScat mission will observe ocean wind speed and direction over most of the globe, bringing a new eye on tropical storms, hurricanes and typhoons. Here are five fast facts about the mission.

User comments : 0