Related Clues:

• Krypton, for one
• Mercury, for one
• Probe's target
• Venus or Mars
• Space occupier
• Revolutionary figure?
• Venus, e.g.
• Mars, for one
• Starship stop
• Celestial body
• Clark Kent's newspaper
• Lois Lane's employer
• Evening star, e.g.
• Earth, for one
• "___, won't you?" (query from old commercials for The Jetsons)