Mission Planet - Interplanetary Space Travel to Mars

Mission Planet - Interplanetary Space Travel to the Moon and to Mars. A scientifically curious community. What challenges must we overcome to return to the moon, and traveling on to Mars. Space stations on the moon and Mars. Will space elevators be ready in time?
 

Mission Planet on Google Groups
A scientifically curious community. Memberships available by request. Be sure to include a personal note as to why you want to join, otherwise the request will be automatically rejected.