right ascension: (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
space: an empty area (usually bounded in some way between things)
realist: a painter who represents the world realistically and not in an idealized or romantic style