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Space & Astronomy

Giant extra-galactic planet discovered

By T.K. Randall
November 20, 2010 · Comment icon 12 comments



Image Credit: NASA
For the first time scientists have observed a planet that originated outside our own galaxy.
Situated 2,000 light years from Earth this new planet was actually formed within a dwarf galaxy that merged with our own Milky Way galaxy several billion years ago.
To date about 500 planets have been discovered within our galaxy, but this is the first known to have been born elsewhere. The gas planet, at least 25 per cent heavier than Jupiter Ė or 400 times heavier than Earth Ė orbits a star that started life in a dwarf galaxy.


Source: Telegraph | Comments (12)


Recent comments on this story
Comment icon #3 Posted by xXHellkittiesXx 13 years ago
I wonder what life would be like on planets in other galaxies?
Comment icon #4 Posted by snuffypuffer 13 years ago
I wonder what life would be like on planets in other galaxies? Probably much like life on planets in this galaxy. I love how finding a new planet is almost commonplace now.
Comment icon #5 Posted by Thrash Dracula 13 years ago
Makes me wonder how typical it is to have some random star floating around with a planetary system in tow out in intergalactic space. What a weird place that would be to live in.
Comment icon #6 Posted by Waspie_Dwarf 13 years ago
Makes me wonder how typical it is to have some random star floating around with a planetary system in tow out in intergalactic space. What a weird place that would be to live in. That's not what happened. It was always part of a galaxy, just not ours. It was part of a dwarf galaxy that merged into the milky way, so it was never really in intergalactic space.
Comment icon #7 Posted by danielost 13 years ago
That's not what happened. It was always part of a galaxy, just not ours. It was part of a dwarf galaxy that merged into the milky way, so it was never really in intergalactic space. this is true. but i have two questions. 1 did this star actually form before or after the two galaxies merged, if after than it should probable called a local star. 2 do the stars of this dwarf galaxy still more or less orbit the center of that galaxy as it orbits ours.
Comment icon #8 Posted by Waspie_Dwarf 13 years ago
this is true. but i have two questions. 1 did this star actually form before or after the two galaxies merged, if after than it should probable called a local star. I think you have answered your own question. The fact that the star this planet orbits is called extragalactic star and not local is a bit of a clue, besides how could it have formed in a dwarf galaxy AFTER it had merged with the milky way, by definition the dwarf galaxy ceased to be a separate entity once the two objects merged. 2 do the stars of this dwarf galaxy still more or less orbit the center of that galaxy as it orbits our... [More]
Comment icon #9 Posted by danielost 13 years ago
I think you have answered your own question. The fact that the star this planet orbits is called extragalactic star and not local is a bit of a clue, besides how could it have formed in a dwarf galaxy AFTER it had merged with the milky way, by definition the dwarf galaxy ceased to be a separate entity once the two objects merged. They would have done whilst the dwarf galaxy was separate. Now that the dwarf galaxy has merged into the milky way it no longer exists and so stars can not orbit it's centre. HIP 13044 does, however, orbit the milky way in an unusual way. It is part of the Helmi strea... [More]
Comment icon #10 Posted by Kitana2010 13 years ago
Random thought, Why can't we ever give planets a COOL name? I mean, "HIB 13044"? Bor-ing. I vote we rename it "Jose" or "Alberto" something ethnic. After all, it IS an immigrant! *wink* Hey, someone check that planets papers!
Comment icon #11 Posted by danielost 13 years ago
Random thought, Why can't we ever give planets a COOL name? I mean, "HIB 13044"? Bor-ing. I vote we rename it "Jose" or "Alberto" something ethnic. After all, it IS an immigrant! *wink* Hey, someone check that planets papers! actually we will probable be calling them sol 1 sol 2 sol 3. letting the locals name them.
Comment icon #12 Posted by thefinalfrontier 13 years ago
Random thought, Why can't we ever give planets a COOL name? I mean, "HIB 13044"? Bor-ing. I vote we rename it "Jose" or "Alberto" something ethnic. After all, it IS an immigrant! *wink* Hey, someone check that planets papers! planets and stars were given numbers so as they could be catalouged for knowing what part of the galaxy or universe (exoplanets) they reside in, however some are named and most are named after the mythical gods,


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