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If there so many planets out there in space why aren't there any human colonies on other planets?

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Learninglife9 · 61-69, F
One other than the planets in this solar system humans can not get to any of them not for sure if they can get Pluto or Uranus or Neptune.

Where there is no oxygen humans cannot exist.

Where there is no earthly food humans cannot exist.

Where there is no fresh earthly water humans cannot exist.

And humans don't have the technology to terraform it or build on it definitely not able to get there you know how much rocket fuel letter take.
ArishMell · 70-79, M
@Learninglife9 It may not take ever so much fuel because once a spacecraft has been accelerated to its cruising speed the engines are turned off and it keeps going at that speed.

You are right though - no other planets in the Solar System can support human life: Mars is the only one we may be able to visit but we would not be able to walk about on it without space-suits. The others would be even more deadly.

Then there is the matter of time to reach them... oh, and does anyone want to come home?