| 100% | ORK | 3 | Planet whose inhabitants age backward |
| 37% | ORK | 3 | TV planet on which people age backward |
| 36% | SATURN | 6 | Planet whose largest moon is Titan |
| 36% | MERCURY | 7 | Planet whose year is the shortest |
| 36% | URANUS | 6 | Planet whose name often causes giggling |
| 35% | PLUTO | 5 | Planet whose name is a Disney character |
| 35% | JUPITER | 7 | Planet whose rings were discovered in 1979 |
| 35% | VENUS | 5 | Planet whose atmosphere is mostly carbon dioxide |
| 35% | URANUS | 6 | Planet whose name makes middle schoolers laugh |
| 34% | MARS | 4 | Planet whose name is also a candy company |
| 34% | MARS | 4 | Planet whose evening temperatures plunge to -200°F |
| 33% | SATURN | 6 | Planet whose rings were discovered by Galileo in 1610 |
| 33% | HOERVERDE | 9 | Brazilian town whose inhabitants vanished in 1923 |
| 33% | ANTWERP | 7 | Belgian city whose inhabitants are called Sinjoren |
| 33% | MARTIAN | 7 | Inhabitant of the red planet |
| 33% | ALIEN | 5 | Inhabitant from a different planet |
| 32% | SATURN | 6 | Planet whose day is 10 hours and 34 minutes long |
| 32% | URANUS | 6 | Only planet whose name comes from Greek mythology |
| 31% | PLUTO | 5 | Dwarf planet whose moons include Charon and 12-Down |
| 31% | APES | 4 | Inhabitants of a sci-fi film planet |
| 31% | MINOANS | 7 | Inhabitants of Crete during the Bronze Age |
| 30% | APE | 3 | Inhabitant of a 1968 sci-fi movie planet |
| 29% | YEMENI | 6 | Inhabitant of the country whose capital is Sana'a |
| 29% | BOGOTA | 6 | Capital whose first inhabitants were the Muisca |
| 29% | YOGA | 4 | Lenovo laptop whose screen bends over backward |
| 29% | BERKELEY | 8 | City whose newspaper is the Daily Planet |
| 29% | NAVI | 4 | "Avatar" aliens whose home planet is Pandora |
| 29% | TODDLER | 7 | One whose age is given in months |
| 29% | CELT | 4 | British Isles inhabitant during the Iron Age |
| 28% | YAM | 3 | Vegetable whose name is a month spelled backward |