Sidereal
Pronunciation or
- UK IPA: /saɪˈdɪəriəl/
- US IPA: /saɪˈdɪɹiəl/ or IPA: /səˈdɪɹiəl/
Origin
Latin sidereus, from sidus, sider-, star
Adjective
sidereal
- Of or relating to the stars.
- 1919, Hector Macpherson, S.Chapman (series editor), , Chapter V,The field of sidereal astronomy, therefore, was virtually untrodden when, shortly after the beginning of his telescopic work, Herschel began his first review of the heavens.
- (astronomy) Relating to a measurement of time relative to the position of the stars.
- 1903, Percival Lowell, , Chapter I,Then, from a sufficient number of observations of synodic periods to give their mean, we obtain the sidereal period, or period with reference to the stars.
- (astronomy) Relating to a measurement of time relative to the point of the vernal equinox.