stargazer

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Informal An astronomer.
• noun An astrologer.
• noun A daydreamer.
• noun Any of various bottom-dwelling marine fishes of the families Uranoscopidae and Dactyloscopidae, having eyes on the top of the head.

from The Century Dictionary.

• noun One who gazes; at the stars; especially, an astrologer, or, humorously, an astronomer.
• noun A book-name of fishes of the family Uranoscopidæ: so called from the vertical eyes. The name originally designated Uranoscopus europæus. Astroscopus guttatus is a common stargazer of the United States.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who gazes at the stars; an astrologer; sometimes, in derision or contempt, an astronomer.
• noun (Zoöl.) Any one of several species of spiny-rayed marine fishes belonging to Uranoscopus, Astroscopus, and allied genera, of the family Uranoscopidæ. The common species of the Eastern United States are Astroscopus anoplus, and Astroscopus guttatus. So called from the position of the eyes, which look directly upward.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun One who stargazes.
• noun A perciform fish in the family Uranoscopidae.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun heavy-bodied marine bottom-lurkers with eyes on flattened top of the head
• noun someone indifferent to the busy world
• noun a physicist who studies astronomy