Scientists discover loneliest planet without a companion sun
The free-floating planet is estimated to be around 80 light years away from Earth
Steve Connor is the Science Editor of The Independent. He has won many awards for his journalism, including five-times winner of the prestigious British science writers’ award; the David Perlman Award of the American Geophysical Union; twice commended as specialist journalist of the year in the UK Press Awards; UK health journalist of the year and a special merit award of the European School of Oncology for his investigative journalism. He has a degree in zoology from the University of Oxford and has a special interest in genetics and medical science, human evolution and origins, climate change and the environment.
Thursday 10 October 2013
A lonely planet floating through space without a companion star has been discovered by an international team of astronomers who said that it is the first planet to be found without a sun.
The cold, dark planet is about six times the mass of Jupiter – a “gas giant” planet – and is estimated to have formed just 12 million years ago, making it a mere infant in astronomical terms.
Known by its code name, PSO J318.5-22, it was discovered about 80 light years away from Earth by scientists analysing data from the Pan-STARRS 1 telescope sited on top of the Haleakala volcanic mountain on the island of Maui in Hawaii.
“We have never before seen an object free-floating in space that that looks like this. It has all the characteristics of young planets found around other stars, but it is drifting out there all alone. I had often wondered if such solitary objects exist, and now we know they do,” said Michael Liu of the Institute for Astronomy at the University of Hawaii at Manoa, who led the team.
Since the mid-1990s, hundreds of “exoplanets” beyond our own Solar System have been discovered using sophisticated techniques that usually involve detecting the decreased transmission of light as a planet passes in front of its sun.
The lonely planet was found by a different method during a search for failed stars known as brown dwarfs, which are very faint objects due to their cool temperatures and have colours at the red end of the light spectrum.
Niall Deacon of the Max Planck Institute for Astronomy in Germany, and a co-author of the study, said: “Planets found by direct imaging are incredibly hard to study, since they are right next to their much brighter host stars. PSO J318.5-22 is not orbiting a star so it will be much easier for us to study. It is going to provide a wonderful view into the inner workings of gas-giant planets like Jupiter shortly after their birth.”
Other telescopes on the summit of Mauna Kea on the island of Hawaii followed up the initial discovery with further observations in the infrared part of the spectrum. This confirmed that PSO J318.5-22 was not a brown dwarf, but a young planet.
Board creates magnetic field to achieve lift
Singer says the track was 'force-fed down people's throats'
Endangered species spotted in a creek in the Qinling mountains
Trend which requires crisps, a fork and a strong stomach is sweeping Mexico's streets
George Lucas criticises the major Hollywood film studios
Some experiencing postnatal depression don't realise there is a problem. What can be done?
Does Chris Grayling realise what a vague concept he is dealing with?
- 1 Jack the Ripper: Scientist who claims to have identified notorious killer has 'made serious DNA error'
- 2 Banksy arrest hoax: Internet duped by fake report claiming street artist's identity has been revealed
- 3 Drink alcohol and eat meat to improve male fertility - but cut down on coffee, studies suggest
- 4 Former East 17 frontman Brian Harvey turns up at Downing Street and 'demands to speak to Prime Minister'
- 5 The inventor of the Facebook 'like' button says he never made a 'dislike' button because he feared the 'unfortunate consequences'
Ukraine crisis: Donetsk 'tactical missile' explosion at factory sends blast wave across rebel-held city
Jack the Ripper: Scientist who claims to have identified notorious killer has 'made serious DNA error'
Banksy arrest hoax: Internet duped by fake report claiming street artist's identity has been revealed
Super-sized ships arrive in Britain: How big can they get?
Former East 17 frontman Brian Harvey turns up at Downing Street and 'demands to speak to Prime Minister'
Cameron is warned 'no possibility' of UK reducing immigration and that bid to bring in quota on migrant workers would be illegal
Residents should throw a street party and mix with immigrant neighbours, councils told
Russell Brand threatened with arrest after filming outside Fox News headquarters
Amal Alamuddin calls for the return of the Elgin Marbles from Britain: 'Injustice has persisted for too long'
London bus driver 'kicks gay couple off for kissing'
Lord Freud: Tory welfare minister apologises after saying disabled people are 'not worth’ the minimum wage
Negotiable: Randstad Education Leicester: We are recruiting for a Systems and ...
£120 - £140 per day: Randstad Education Group: English as an Additional Langua...
£10000 - £15000 per annum: Randstad Education Cambridge: Nursery assistants re...
£60 - £65 per day: Randstad Education Liverpool: Job opportunities for Seconda...