[ar-uh-stahr-kuh
s] 
| 1. | of Samos. late 3rd century b.c., Greek astronomer. |
| 2. | of Samothrace. c216–144 b.c., Greek philologist and critic. |
| 3. | an extremely bright crater in the second quadrant of the face of the moon: about 29 miles (47 km) in diameter from crest to crest. |