| Answer | Crossword Clue |
|---|---|
| ORBS | Planets, to poets |
| ORBS | Poet's planets |
| ORBS | Planets, per poets |
| PIONEER | First mission to visit the outer planets |
| SETI | Gp. devoted to finding life on other planets |
| ARAL | Sea subject to one of the planet's worst environmental disasters |
