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.
雙語例句
1. The sidereal year is not used to construct a calendar.
恒星年不用于編制年歷.
來自辭典例句
2. A sidereal day is about 4 minutes shorter than a solar day.
一個恒星日比一個太陽日大約短4分鐘.
來自辭典例句
3. A sidereal day is shorter than a mean solar day by 3 minutes and 56 seconds.
恒星日比平均太陽日短三分五十六秒.
來自辭典例句
4. Tropical year, and sidereal year are two different concepts.
回歸年與恒星年是不同的兩個概念.
來自互聯網
5. A solar day is four minutes longers than a sidereal day.