| Northern extremes? |
| Ordinal extremes |
| Marxism extremes? |
| Caloric extremes? |
| Planetary impact consequences |
| Planetary rulers in a 1968 movie |
| Planetary orbiters |
| Legal extremes? |
| Logical extremes? |
| Region of interplanetary space — battered soil (anag) |
| Interplanetary visitors, in old sci-fi films |
| Planetary reflection ratios |
| Interplanetary dictator in Scientology who we're not supposed to talk about |
| Interplanetary graffiti artist's action? |
| Planetary satellites |
| Planetary reflections |
| Astronomer who described planetary motion |
| Cosmetic extremes? |
| C.E.O. of the Planetary Society starting in 2010 |
| Lateral extremes? |
| Planetary extremes |
| Planetary reflected-light ratio |
| Bill of the Planetary Society |
| Planetary habitation |
| Economic extremes |
| Planetary reflectivity measure |
| Like many planetary orbits |
| Imaginary planetary line |
| Orbital extremes |
| Planetary paths |