n.
Pronunciation: ˌ as-( ˌ )tr ō -f ə - ' tä-gr ə -f ē
Function: noun
Etymology: International Scientific Vocabulary
Date: circa 1858
: photography involving astronomical objects and events
– as · tro · pho · to · graph \ - ' f ō -t ə - ˌ graf \ noun
– as · tro · pho · tog · ra · pher \ -f ə - ' tä-gr ə -f ə r \ noun