Answer: astr
AnswerCrossword Clue
ASTRCopernicus's field: Abbr.
ASTRSpace: Prefix
ASTRObservatory observer: Abbr.
ASTRNASA subj.
ASTRHeavenly field?: Abbr.
ASTRSci. of the heavens
ASTRCarl Sagan's subj.
ASTRScience class: Abbr.
ASTROne of the hard sciences: Abbr.
ASTRSci. of stars, etc.
ASTRStudy of the heavens: Abbr.
ASTRKepler's subj.
ASTRSci. for Kepler
ASTRStar: Comb. form
ASTRKepler was one: Abbr.
ASTRGalileo was one: Abbr.
ASTRStar: Prefix
ASTRMan with a telescope: Abbr.
ASTRHeavens: Prefix
ASTRSci. branch
ASTRPalomar sci.
ASTRHubble's sci.
ASTRStar combiner
ASTRSagan's calling: abbr.
ASTRSagan's specialty (Abbr.)
ASTRCarl Sagan's sci.
ASTRSci. of stars
ASTRSagan's specialty: Abbr.
ASTRSubj. for Galileo
ASTRThe heavens: Prefix.
ASTRStellar start?
ASTRSpace science: Abbr.
ASTRSci. major
ASTRPhysics dept. offering
ASTRGalaxy sci.
ASTRCollege sci. class
ASTRObservatory subj.
ASTRField in which things are looking up?: Abbr.
ASTRSagan's subj.
ASTRColl. major involving an observatory