Astronomy Stack Exchange
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Questions tagged [rogue-planet]

Questions about planets that do not orbit around a star. These planets travel through space.

Questions about planets that do not orbit around a star. These planets travel through space. Rogue planets probably were ejected from their former parent star.

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Are there any probabilistic models for the likelihood of finding a rogue planet closer to us than Proxima Centauri?

There are some articles that claim there could be more rogue planets than stars in our galaxy such as this one. Now if this were true one might expect that there is a rogue planet closer to the earth than the star Proxima Centauri. Have any models…
Sidharth Ghoshal
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Is there any hard evidence that rogue planets exist?

A rogue planet (or a rogue anything, for that matter: a celestial body other than a star) is something that's drifting through space without being attached by gravity to any star. They're just out there in the big black void. Is there any evidence…
Ricky
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Detecting a Rogue Planet from Earth

This is for a novel. A rogue planet, is, by a one-in-a-zillion freak chance, on its way to collide with Earth. It has been drifting in interstellar space since its original formation (billions of years ago), and thus will be about as cold as it can…
EvilSnack
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Is it possible that a star system ejects an object out of the galaxy?

I know it is possible that a star system ejects a planet out of the star system and the planets becomes rogue planets and orbit around the galaxy. Is it also possible that a planet gains enough speed because of ejecting and escapes out of the…
Gstestso
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Can rogue/nomad planets and other starless planetary bodies orbit each other in a stable system?

Nomad planets (also called planemos or rogues planets) which drift in space without a star or substellar object to orbit. The majority of such planets we have discovered are gas planets with thick atmospheres and no landmass, although some of them…
Nirvana
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Has the existence of earth-sized rogue planets been confirmed?

The list of known rogue planets provided by Wikipedia is fairly short. Some are "candidates"; others "may be" red dwarfs. The two confirmed rogue planets are several times the size of Jupiter. I understand that rogue planets can only be detected if…
Ricky
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Can a rogue planet neither orbit around a star nor a galaxy?

As we know, rogue planets don't orbit around a star, how about galaxy? Can a rouge planet not orbit around a galaxy?
Gstestso
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Survival on a rogue planet

Are there any planets not orbiting a celestial body which can support life despite the temperature? Also what is the absolute minimum temperature that life can survive in?
Psy
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