Astrophysics
Pronunciation : As`tro*phys"ics
Part of Speech : n. [Astro-+ physics.] (Astron.)
Definition : Defn: The science treating of the physical characteristics of the stars and other heavenly bodies, their chemical constitution, light, heat, atmospheres, etc.
Its observations are made with the spectroscope, bolometer, etc., usually in connection with the telescope.
Source : Webster's Unabridged Dictionary, 1913