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galactic longitude
noun
Astronomy.
- the angular distance in degrees measured eastward in the galactic plane from a radius drawn from the earth as center to the constellation Sagittarius.
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˜yÐÄvlog History and Origins
Origin of galactic longitude1
First recorded in 1910–15
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Example Sentences
Instead of giving the galactic longitude and latitude of a star we may content ourselves with giving the galactic square in which the star is situated.
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The fourth column gives the galactic square, the fifth and sixth columns the galactic longitude and latitude.
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Adopting, the additional computative burden imposed by it notwithstanding, Schonfeld's modification of Airy's formul�, he introduced into his equations a fifth unknown quantity expressive of a possible stellar drift in galactic longitude.
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