sidereal

英 [saɪ'dɪərɪəl] 美 [saɪ'dɪrɪəl]

解释

※ 提供单词"sidereal"的中文意思、发音示范及音标对照，中英文词源、例句和用法等。

sidereal 恒星的

来自法语 sidereal,恒星的，来自拉丁语 sideris,星星的，所有格形式于 sidus,星星，星辰，词源同 consider,desire.

sidereal (adj.): also siderial, 1630s, "star-like;" 1640s, "of or pertaining to the stars," earlier sideral (1590s), from French sidereal (16c.), from Latin sidereus "starry, astral, of the constellations," from sidus (genitive sideris) "star, group of stars, constellation," probably from PIE root *sweid- "to shine" (cognates: Lithuanian svidus "shining, bright"). Sidereal time is measured by the apparent diurnal motion of the fixed stars. The sidereal day begins and ends with the passage of the vernal equinox over the meridian and is about four minutes shorter than the solar day, measured by the passage of the sun over the meridian.

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2. A sidereal day is about 4 minutes shorter than a solar day.: 一个恒星日比一个太阳日大约短4分钟.

3. A sidereal day is shorter than a mean solar day by 3 minutes and 56 seconds.: 恒星日比平均太阳日短三分五十六秒.

4. Tropical year, and sidereal year are two different concepts.: 回归年与恒星年是不同的两个概念.

5. A solar day is four minutes longers than a sidereal day.: 一个太阳日比一个恒星日长4分钟.