http://en.wikipedia.org/wiki/Venusthis is a wiki article on venus, i recoment you all read it before posting here.
Known things:
-acid atmosphere or at least rain
-volcanicly active
Unknown things:
-same solar system? i think this unlikely because the starship had ion thrusters and they would not be viable for interpalanetary, only interstellar.
-blight?
-weather(refer to wiki article)
-big crustal rearangement thing(again, refer to wiki article)
-why both landed here?