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单词 galactic longitude
释义

Definition of galactic longitude in English:

galactic longitude

noun

  • The longitude of a point on the sky measured from a reference point on the galactic equator, usually defined either by the direction of the centre of the galaxy or by the intersection of the galactic and celestial equators.

Origin

Late 19th century; earliest use found in Monthly Notices of the Royal Astronomical Society.

Definition of galactic longitude in US English:

galactic longitude

noun

  • The longitude of a point on the sky measured from a reference point on the galactic equator, usually defined either by the direction of the centre of the galaxy or by the intersection of the galactic and celestial equators.

Origin

Late 19th century; earliest use found in Monthly Notices of the Royal Astronomical Society.
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更新时间：2024/12/26 23:27:10