| Answer | Crossword Clue |
|---|---|
| EULER | A lunar crater |
| COPERNICAN | Of a lunar crater. |
| TYCHO | Lunar crater named for a Danish astronomer |
| EULER | Swiss mathematician for whom a lunar crater was named |
| OMAR | Early astronomer for whom a lunar crater is named |
| GIORDANO | Italian philosopher ... Bruno, whose name was given to a lunar crater |
| LINNE | Lunar crater |
| BEER | Lunar crater |
| TSIOLKOVSKY | Lunar crater. |
| TYCHO | Large lunar crater |
| LINNE | Small lunar crater. |
| COPERNICUS | Prominent lunar crater |
| SCHORR | Lunar impact crater |
| BESSEL | Lunar crater named for an astronomer |
