視恆星時 的英文怎麼說
中文拼音 [shìhéngxīngshí]
視恆星時
英文
apparent sidereal time- 視 : Ⅰ動詞1. (看) look at 2. (看待) regard; look upon 3. (考察) inspect; watch Ⅱ名詞(姓氏) a surname
- 恆 : Ⅰ形容詞1 (永久; 持久) permanent; lasting 2 (平常; 經常) usual; common; constant Ⅱ名詞1 (恆心...
- 星 : 名詞1 (夜晚天空中閃爍發光的天體) star 2 [天文學] (宇宙間能發射光或反射光的天體) heavenly body...
- 時 : shí]Ⅰ名1 (比較長的一段時間)time; times; days:當時at that time; in those days; 古時 ancient tim...
- 恆星 : [天文學] fixed star; star恆星大氣 stellar atmosphere; 恆星導航 star navigation; stellar guidance;...
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We have to use some other methods to measure the luminosity or equivalently the absolute magnitude of the cepheid variable. since we can readily measure the apparent magnitude of a cepheid variable, to measure the luminosity means measuring the distance. we use some distance measurement methods, for example, parallax, to determine the relation
要弄清這個關系,我們要知道不同造父變星的光度和光變周期數據,量度光變周期當然不是問題,但要得知一顆恆星的光度,我們首先要得知它的距離,這時便須藉助好像視差法等其他量度天體距離的方法。But during an eclipse, stars whose line of sight lies near the sun can be photographed.
但在日蝕的時候,那些在我們的視線看來處在太陽附近的恆星,卻可以用照相方法攝下來。Local apparent sideral time
地方視恆星時
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