guide star

Fetched 2026-10-26 (cache).

Synonyms: guide bar

Antonyms: guide bar

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|astronomy}} A [[reference star]] that is used to maintain the [[alignment]] and [[tracking]] of a [[telescope]] (as the Earth rotates)

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.