Last Updated
：2025/11/21
helium variable
（ plural ）
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(astronomy) A star in which the strength of the helium absorption lines vary periodically; at times appearing to be a helium star.
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helium variable
The observatory cataloged a helium variable in the field, a star whose helium absorption lines vary with a strict rotational period.
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The observatory cataloged a helium variable in the field, a star whose helium absorption lines vary with a strict rotational period.
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