Questions tagged [rogue-planet]

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

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9
votes
4answers
988 views

How are rogue planets discovered?

Planets are usually found by observing a star and waiting for the light level to drop when a planet passes in front of it, but what about rogue planets that don't have host stars?
10
votes
3answers
4k views

How well would the Moon protect the Earth from an Asteroid?

Would the Earth fare better if the Moon blocked the meteor, comet, rogue planet, or otherwise rather than a direct impact? At what point would the Moon's debris would be an extinction event? The ...
8
votes
2answers
773 views

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 ...
3
votes
1answer
266 views

Effects of a rogue planet passing between the Earth and the Moon?

The plot of Thundarr the Barbarian got me thinking about the science behind the passage of a runaway planet between the Earth and the Moon and its effect on the Earth and Moon themselves, as well ...
2
votes
2answers
160 views

What natural mechanisms could lead to the unlikely case of the same rogue asteroid or planet passing through our solar system twice?

I find he following answer to the question What's the soonest Oumuamua could return? unsatisfying and oversimplifying and the last five words "Therefore it will never return." unsupported at a minimum....
2
votes
3answers
5k views

When the sun explodes, will some of the planets in the Solar System survive and become rogue planets?

Say if a large enough star, that has a number of planets, were to explode in a supernova: Would any of the planets survive? Would they become rogue planets?
4
votes
2answers
347 views

Potential Re-Capture of Rogue Planets

Rogue planets can be designated as rogue planets due to one of two possible scenarios: 1) the "rogue planet" formed as a sub-brown dwarf, or 2) the planet was ejected from its home star system. I want ...
4
votes
3answers
2k views

What would happen if a rogue planet hit one of the planets in our Solar System?

As there are millions of rogue planets in the Milky Way, what would happen if one hit a planet in the Solar System. For example, if the rogue planet hit Pluto, would Pluto fall in to the Sun due to ...
4
votes
2answers
985 views

Motion of rogue planets

Two Questions: 1) Are rogue planets in motion, i.e. are they just wandering freely in space or stationary? 1) Do rogue planets have defined path or a one which can be anticipated? I understand that ...
4
votes
1answer
492 views

Is it likely that intergalactic stars would still retain their planets?

Given that we've discovered hundreds of intergalactic stars (IGs), and that most stars have planets, what do we know about the likelihood of IGs retaining their planets after being ejected from their ...
2
votes
0answers
84 views

Life in sufficiently hot rogue planets [closed]

The Milky Way has a bright center we can't see directly because of space dust. Are there's regions of the galaxy free of that dust that could receive all that light and radiation, right? Would it be ...
2
votes
2answers
173 views

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 ...
0
votes
2answers
115 views

Survival on a rogue planet [closed]

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?