to in outer space.
the science dealing with the structure and composition of planets and other bodies in the solar system. noun the study of the structure, composition, and history of other planets and other bodies in the solar system
astroglia astroglia as·trog·li·a (ās-trŏg’lē-ə) n. See astrocyte.
a navigational device for projecting altitude curves of the stars and planets onto charts or plotting sheets.
a hypocycloid with four cusps. noun (maths) a hypocycloid having four cusps adj. “star-shaped,” 1897, from Greek astroeides, from astron “star” (see astro-) + -oeides (see -oid).