Answer: astronomer

AnswerCrossword Clue
ASTRONOMER

SIR CHRISTOPHER WREN

ASTRONOMER

A student hoping to become an ... took a short-answer test...

ASTRONOMER

Celsius, for one

ASTRONOMER
Hubble, for one
ASTRONOMER
Galileo, for one
ASTRONOMERCopernicus, notably
ASTRONOMERApt anagram of MOON STARER
ASTRONOMERSir James H. Jeans.
ASTRONOMERShapley, for example.
ASTRONOMERPalomar scientist.
ASTRONOMERTycho Brahe, for one
ASTRONOMERWhat a mixed-up "moon-starer" really is
ASTRONOMERHalley, e.g.
ASTRONOMERHis business is looking up
ASTRONOMERGalileo was one
ASTRONOMEROne who knows what's up?
ASTRONOMERSatellite tracker