Last Updated
：2025/11/21
right ascension
（ plural ）
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(astronomy) The angular distance east of the vernal point (“the solar zenith at the March equinox”); the celestial equivalent of longitude.
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right ascension
The telescope's tracking system adjusts for the star's right ascension to maintain a steady image during the long exposure.
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The telescope's tracking system adjusts for the star's right ascension to maintain a steady image during the long exposure.
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