Sidereal year

Pronunciation: /ˈsaɪdˈɹiɫ ˈjɪɹ/

Sidereal year (noun)

  1. The time it takes Earth to complete one orbit around the Sun measured against the fixed positions of distant stars.

Examples

  • A sidereal year is a star-based year measured by Earth’s orbit.
  • The sidereal year is a star-based year, not based on the seasons.