Some scientists are looking for planets like
Earth, but they're so, so far away that I don't
think we'll ever get to them. The closest
planet that might be sort of like earth is about
12 light-years away, which means it takes 12 years
for light to travel from the planet to us - and 12
years for the light to travel back to the
planet! We're a lot heavier than light and we
travel much, much, much slower!
I think we might make space stations on a planet
in our solar system - most likely Mars - at some
time in the distant future. To make Mars into
a place where we could live, we'd need to
'terraform' it - we'd need to make large areas
of Mars into a place where people could live.
Here's a Wikipedia article about that:
Terraforming of Mars - Wikipedia
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