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Asked by anon-281857 on 24 Mar 2021.
Question: have aliens ever visited ?
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Martin McCoustra answered on 9 Mar 2021:
Why would they want to visit here? We’re in a boring little cul-de-sac of the Milky Way. It’s a long way to come and that’s the problem. Distances in space are really big… even if we travelled as fast as light it would take us 4.5 years to get to the nearest star. The same is true of any aliens that might want to visits it. It’ll take them years… 10s of years… maybe even centuries. So there might be aliens out there but they aren’t likely to visit us given the restrictions imposed by physics.
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Jesko Koehnke answered on 9 Mar 2021:
We don’t know. Given the size of the universe it is very likely that life exists elsewhere. The closest star to earth (that is not our sun) is proxima centauri, and it would take us over 4 years to get ther IF we could travel at the speed of light. Using what we have now it would take about 100,000 years to get there.
So if aliens developed technology that allowed them to fly such enormous distances in a short period of time, we would be like ants to them, far less advanced that a cave man would seem to us. Would you want to visit a planet like that? Perhaps, but the things living there would not see me if I did not want to be seen. -
Nikita King answered on 10 Mar 2021:
No that I know of… but if you look at pictures of some deep sea creatures (e.g drooping lipped fish and ghost shark) they look like aliens living here already!
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Ane Valera answered on 10 Mar 2021:
There are a lot of conspiranoic theories saying that we have been visited at some point, but nothing has been demonstrated so far and those theories don’t have any scientific support, so we could say, that as far as we are aware…we haven’t!
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Ben Esse answered on 10 Mar 2021:
Not to our knowledge. I would say probably not given the scale of the Universe as it would take a long time to traverse the distances between solar systems (the nearest to us is Alpha Centauri which is 4.37 light years away) but there may be ways to travel these distances faster than light. If they did visit I think it would probably be to see an eclipse. It is purely by chance that the Moon and the Sun are the same apparent size in the sky (the Sun is ~400 times bigger but also ~400 times further away) so that they perfectly cover one another in an eclipse. If either were a different distance from the Earth or a different size the eclipse would be different, so this is probably a really rare event in the Universe!
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