单词 | sidereal hour |
例句 | The latter are divided into sidereal hours, minutes and seconds as the solar day is. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" The sun apparently moves at the rate of 15� in a solar hour; the stars at the rate of 15� in a sidereal hour. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" For example, if the right ascension of a star is exactly 15�, it will pass the meridian one sidereal hour after the vernal equinox. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" |
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