Related Clues:

• Opportunity visited it
• ___ rover
• Viking mission
• Popular sci-fi locale
• Blemishes
• His horses were Flame and Terror
• Hawkish Olympian
• Hershey rival
• Fourth planet
• Mars' alias
• Mars, in Athens
• Pathfinder's destination
• Trojan ally
• Planet between Earth and Jupiter
• Deimos orbits it