Is there life on other Planets?
We haven't found evidence of life on any other planets yet, but we have only looked at Mars and we haven't looked very thoroughly yet.
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Mars is one of our few neighbouring planets, that orbit around our sun. However there are plenty of other suns and plenty of other planets.
Here is the maths to prove it.
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there are 100 billion stars in our galaxy.
- there are 100 billion galaxies in the universe.
- 20% of stars have planets
So multiply the stars by the galaxies and divide by number with planets and you get
2000 billion solar systems with planets in the universe.
A big question then is that if there is so much life out there, why can't we hear it when we listen with our radio telescopes? Scientists at SETI have been searching for extra-terrestrial life for over half a century now, but have not yet heard anything that sounds like Aliens.
In the future mankind will almost certainly travel to all the other planets in our solar system. However the idea of travelling to other suns is (for the present time at least) only possible in the worlds of science fiction. We don't yet have the technology to even consider such a feat. However we can send radio signals and maybe oneday we will hear some reply.