At the moment we know that venus is a similar size to Earth – but we don’t know much more about it. It is warmer than earth as it is closer to the sun and also has shorter years as it takes less time to travel around the sun.
Venus has longer days than earth though because it spins round very slowly compared with earth.
Scientists recently discovered a number of potentially Earth-like habitable exo-planets far out in space, but they are all outside our solar system – so it would take us a very, very long time to reach them!
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