Answer:

astronomy

Answer	Crossword Clue
ASTRONOMY	Carl Sagan's interest
ASTRONOMY	Stardom?
ASTRONOMY	Study of the planets

ASTRONOMY	Halley's field
ASTRONOMY	MAYan civilization's scientific study
ASTRONOMY	Field where Arabic etymologies are common
ASTRONOMY	Study of the heavenly bodies.
ASTRONOMY	Oldest of the sciences.
ASTRONOMY	Tycho Brahe's field.
ASTRONOMY	Space science
ASTRONOMY	Uranologist's field

ASTRONOMY	Star study
ASTRONOMY	Copernican concern
ASTRONOMY	Urania's domain
ASTRONOMY	Space studier's field
ASTRONOMY	Star search?