Volunteers wanted for planet hunt

time-lapsed images of a single star Time-lapsed images of a single star show dips in brightness as a planet passes

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Members of the public are being asked to join the hunt for nearby planets that could support life.

Volunteers can go to the Planethunters website to see time-lapsed images of 150,000 stars, taken by the Kepler space telescope.

They will be advised on the signs that indicate the presence of a planet and how to alert experts if they spot them.

"We know that people will find planets that are missed by the computer," said Chris Lintott from Oxford University.

"When humans have looked at data, we know they find planets that computers can't."


  • Join the hunt for exo-planets at the Planethunters site
  • Watch Stargazing Live on BBC Two at 20:30 GMT on Monday, and 20:00 GMT on Tuesday and Wednesday, 16-18 January 2012
  • Join the Talk Stargazing webchat during the programmes

The Kepler space telescope, launched in 2009, has been searching a part of space thought to have many stars similar to our own Sun.

Its most exciting moment to date has been the discovery of Kepler 22b, a planet close in size and temperature to Earth, lying about 600 light-years away.

Name check

Another nine months of data from the Kepler space telescope is being put online at the Planethunters website to coincide with three consecutive nights of BBC Two's Stargazing Live beginning on Monday 16 January.

Kepler Space Telescope

Infographic (BBC)
  • Stares fixedly at a patch corresponding to 1/400th of the sky
  • Looks at more than 155,000 stars
  • Has so far found 2,326 candidate planets
  • Among them are 207 Earth-sized planets, 10 of which are in the "habitable zone" where liquid water can exist

"By Wednesday we hope to have some exciting discoveries." said Dr Lintott.

The Planethunters website will have time-lapsed sequences of images of about 150,000 stars which have so far only been available to professional astronomers and their computers.

"We are very confident there are more planets lurking in there to be found," Chris Lintott explained.

Anyone spotting a potential planet can flag up the telltale data and, if a significant planet is found, they would be credited with the discovery and their name would appear in any subsequent scientific paper about the discovery.

The human brain would be particularly good at finding any weird or unusual systems says Lintott, involving variable or double stars or multiple interacting planets.

Already several planets have been discovered by the public since the site was put live last year by an international team including scientists from Yale and Oxford universities.

Astrophysicist Tim O'Brien has some top tips for budding stargazers

But sadly, volunteers cannot get a planet named after them, as planet names are derived from the stars they orbit.

Stargazing Live returns to BBC Two at 20:30 GMT on Monday and 20:00 GMT on Tuesday and Wednesday, 16-18 January 2012. Preliminary results of the planet hunt by Stargazing viewers will feature in the final programme.

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