1. sidereal -- (of or relating to the stars or constellations; "sidereal bodies"; "the sidereal system")
2. sidereal -- ((of divisions of time) determined by daily motion of the stars; "sidereal time")
1.
Dim and wonderful is the vision I have conjured up in my mind of life spreading slowly from this little seed bed of the solar system throughout the inanimate vastness of sidereal space. - from The War of the Worlds by H. G. Wells