| Whence the Stranger in "Stranger in a Strange Land" | 61 |
| Vikings' landing site | 25 |
| Viking's landing place | 26 |
| Viking touchdown site | 21 |
| Viking target | 13 |
| Viking mission | 14 |
| Viking II's target | 22 |
| Viking I's perch | 20 |
| Viking I landfall | 17 |
| Viking I destination | 20 |
| Utopia Plains locale | 20 |
| Twix maker | 10 |
| Twix candy maker | 16 |
| TV detective Veronica | 21 |
| Three rocks past Mercury | 24 |
| Third-smallest of nine | 22 |
| Target of NASA's Rover mission | 34 |
| Target of Mariners | 18 |
| Target of Mariner IV | 20 |
| Subject of close-up photos since 1965 | 37 |
| Space-probe target | 18 |
| Space spinner | 13 |
| Son of Juno | 11 |
| Solar-system member | 19 |
| Sojourner's resting place | 29 |
| Snickers company | 16 |
| Snickers alternative | 20 |
| Site of the volcano Olympus Mons | 32 |
| Singer Bruno | 12 |
| Seventh largest planet | 22 |
| Setting of the sci-fi story "Out of the Silent Planet" | 64 |
| Setting of the 2012 film "John Carter" | 48 |
| Setting for part of "Total Recall" | 44 |
| Scratches, perhaps | 18 |
| Sci-fi site | 11 |
| Sci-fi landing site, sometimes | 30 |
| Sci-fi landing site | 19 |
| Rover's turf | 16 |
| Rover's home | 16 |
| Rover's favorite candy bar? | 31 |
| Romulus's father | 20 |
| Romulus's escort to heaven | 30 |
| Revolver between us and Jupiter | 31 |
| Recent NASA target | 18 |
| Pugnacious deity | 16 |
| Popular sci-fi site | 19 |
| Popular sci-fi locale | 21 |
| Planet or war god | 17 |
| Planet or Roman god | 19 |
| Planet in a 1938 radio "invasion" | 43 |
| Place of interest to NASA | 25 |
| Phoenix landing site, 2008 | 26 |
| Phoenix landerÂ’s destination | 32 |
| Patron of Roman husbandmen | 26 |
| Pathfinder's target | 23 |
| Pathfinder's path | 21 |
| Pathfinder's locale | 23 |
| Pathfinder explored it | 22 |
| Pathfinder destination | 22 |
| Our planetary neighbor | 22 |
| Opportunity visited it | 22 |
| Opening movement of Holst's "The Planets" | 55 |
| One of the worlds in "The War of the Worlds" | 54 |
| Olympus Mons's locale | 25 |
| Olympus Mons setting | 20 |
| Olympus Mons location | 21 |
| Olympus Mons locale | 19 |
| Octet member with the shortest name | 35 |
| Noted candy company | 19 |
| Next-door neighbor, in a way | 28 |
| Neighbor of Jupiter | 19 |
| Nearby orb | 10 |
| NASA target | 11 |
| NASA subject | 12 |
| Milky Way owner | 15 |
| Milky Way creator | 17 |
| Men's home? | 15 |
| Maker of Twix and Starburst | 27 |
| Location of Olympus Mons | 24 |
| Jupiter neighbor | 16 |
| Jared Leto's locale in "30 Seconds"? | 50 |
| Its tallest point is Olympus Mons | 33 |
| Its highest point is Mount Olympus | 34 |
| Home of the invaders in Wells's "The War of the Worlds" | 69 |
| He took Romulus to heaven | 25 |
| God for whom a month was named | 30 |
| Global Surveyor's destination | 33 |
| Fourth-from-the-sun planet | 26 |
| Fourth of eight, now | 20 |
| Flash Gordon serial site | 24 |
| Father of Remus and Romulus | 27 |
| Either "M" of M&M's | 37 |
| Earth's outer neighbor | 26 |
| Deimos orbits it | 16 |
| Curiosity's locale | 22 |
| Curiosity's destination | 27 |
| Crooner Bruno | 13 |
| Counterpart of Ares | 19 |
| Common bar name | 15 |
| Candy bar maker | 15 |