parallax second
Of or pertaining to the nucleolus
plural of pseudoseptum
plural of air conditioner
A unit of length, used in astronomy, defined as the distance from the Earth of an object that exhibits a parallax of 1 arcsecond. It is approximately equal to 3.08568025 × 10¹³ kilometers or 3.2616 light years.
天文学者は恒星の距離を比較する際に、しばしばパーセクを標準の単位として使用します。
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