Meanings
nounguide star (plural guide stars)
plural guide stars
- astronomyA reference star that is used to maintain the alignment and tracking of a telescope (as the Earth rotates)
Synonyms & antonyms
Also see
Cite this entry
APA
guide star. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/guide%20star
MLA
“guide star.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/guide%20star. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “guide star,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/guide%20star.
Source: guide star on Wiktionary, CC BY-SA 4.0.