Related Clues:

• First planet, alphabetically
• _______ Day
• Astronaut's final destination
• Home base for everyone
• World
• Third of eight, now
• Third of eight
• Where we are
• Gore's ''___ in the Balance''
• Venus follower, in a way
• Habitat for humanity
• The third planet
• ___ Day, April 22
• Space-station view
• Sci-fi setting, often