galactic coordinate


Definition of galactic coordinate

: a member of a system of celestial coordinates based on the equatorial plane of the Milky Way galaxy

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First Known Use of galactic coordinate

1872, in the meaning defined above

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The first known use of galactic coordinate was in 1872

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Cite this Entry

“Galactic coordinate.” The Dictionary, Merriam-Webster Inc., Accessed 12 December 2019.

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