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Space & Astronomy

'Homeless' planet without a star discovered

By T.K. Randall
November 15, 2012 · Comment icon 30 comments

Image Credit: NASA
Astronomers have identified the first ever 'rogue' planet that wanders around with no star to orbit.
Scientists had suspected that such planets could exist but none had ever been observed until now. Rogue planets are believed to form in one of two ways, either being flung from a solar system or forming in much the same way as a star but never reaching the necessary mass to become one. The planet was found by an international team who searched for the faint infrared glow of a young planet in order to locate it.

The new discovery is approximately 100 light years from the Earth, has a temperature of around 400C and is up to seven times the mass of Jupiter. "We observed hundreds of millions of stars and planets, but we only found one homeless planet in our neighbourhood," said study co-author Etienne Artigau.
Astronomers have spotted a "rogue planet" - wandering the cosmos without a star to orbit - 100 light-years away.


Source: BBC News | Comments (30)




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Recent comments on this story
Comment icon #21 Posted by Mako_Torriblaidd 12 years ago
NIIBIIIRRUUU!!! No... just a planet who may have been lost... oh well.
Comment icon #22 Posted by Mag357 12 years ago
Wonder how they determined it's 400C?
Comment icon #23 Posted by C235 12 years ago
MAAMAAAAA?!
Comment icon #24 Posted by Artaxerxes 12 years ago
How did they determine it was 400C? They stuck a thermometer in it's butt.
Comment icon #25 Posted by BaneSilvermoon 12 years ago
It is a planet because it meets all the necessary criteria to be defined as a planet. This does seem to fit the requirements of being an extrasolar planet.
Comment icon #26 Posted by kobolds 12 years ago
we read alot of planet/star discovery but I wonder when can we see the close up photo of those planet/star.
Comment icon #27 Posted by Dan'O 12 years ago
It is Mongo, the home of Ming the Merciless.
Comment icon #28 Posted by Waspie_Dwarf 12 years ago
would that make it a planet or a brown dwarf? It's not a brown dwarf, it's too small. It has a mass of "between four and seven times that of Jupiter", brown dwarves have masses of 15 to 75 times that of Jupiter. As for it not being a planet because it isn't in orbit around a star, well the International Astronomical Union definition of a planet is limited to solar system objects only, they have not defined what constitutes a planet outside of our solar system. Until they do "planet" is the best fit deion of the object. Maybe it will fly into orbit around a star some time. They should monitor i... [More]
Comment icon #29 Posted by Mag357 12 years ago
It's not a brown dwarf, it's too small. It has a mass of "between four and seven times that of Jupiter", brown dwarves have masses of 15 to 75 times that of Jupiter. As for it not being a planet because it isn't in orbit around a star, well the International Astronomical Union definition of a planet is limited to solar system objects only, they have not defined what constitutes a planet outside of our solar system. Until they do "planet" is the best fit deion of the object. We would have to monitor it for an awfully long time, hundreds of millions, if not billions, of years. Pallidin is correc... [More]
Comment icon #30 Posted by R4z3rsPar4d0x 12 years ago
This is really interesting, I mean Im sure its not a rare accurance in the universe, Its just the first time astronomers have seen one. I mean If im wrong let me know


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