DI __ MET __ R
DIAMETER
U __ IVE __ SE
UNIVERSE
TELE __ COPE
TELESCOPE
M __ TE __RITE
METEORITE
MA __ __ ER
SPACE __RAF __
SPACECRAFT
__ ISTAN __ E
DISTANCE
__ STER __ ID
ASTEROID
O __ SER __ATOR _
OBSERVATORY
C __ M __ T
COMET