| Answer | Crossword Clue |
|---|---|
| EGOS | Spoiled stars' problems |
| EGOS | Big problems of some stars |
| astrolabe | astronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from about 200 b.c. and by Arab astronomers from the Middle Ages until superseded by the sext |
