So, why a manned mission to Europa? You can't really land on it and survive in habitats like Mars (at least not easily) so what's gotten from sending people to Europa other than to say we did/can?
JANEWAY: All right, here's one for you. What can you tell me about the Millennium Gate?
NEELIX: The Millennium Gate. Constructed in the 21st century in the United States of America. It was another one of the objects that could be seen from orbit. Er, three point two kilometres at the base, one kilometre in height, surface covered with highly reflective solar panels. A self-contained ecosystem.
JANEWAY: It became a model for the first colony on Mars. Did you know that one of my ancestors built it?
Christopher's Landing was a domed settlement on Titan, the largest moon orbiting Saturn. In 2065, Zefram Cochrane was given honors at Christopher's Landing after returning to the Solar system after his first use of the warp ship Bonaventure. (ST novel: Federation)
They can take bio domes to mars by 2020.
https://memory-beta.fandom.com/wiki/Confederated_Martian_Colonies
So Earth had intra solar colonies before and during WWIII, and they sat back and let earth burn for 10 years?
Pricks.