Related Clues:
- What a probe may observe
- Earth, say, in tree found by tribe's leader
- Sacellum Sixtinum honoree
- Member of a noted octet
- Energy content of vegetation on which we live
- Word from the Greek for ''wanderer''
- Certain octet member
- Venus, but not Serena
- Pluto, before its downgrade
- Mercury, say, element at outset brought into factory
- Space-traveller's aircraft on time
- Mercury or Mars, many years ago
- Earth perhaps flat? Thinking, originally
- World works to conserve energy
- Mars or Uranus