fixed star

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A star or nebula that appears to remain in constant position relative to other celestial bodies, in contrast with celestial bodies such as the planets in our solar system, whose changes in position relative to the stars are readily observable by telescope or the unaided eye. All stars except the sun are considered fixed stars.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun astronomy Any star that is so distant that its movement, relative to others, is not perceptible; in practice, any star except the sun

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any star in the Ptolemaic theory of planetary motion