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proper motion

  • 自行：天文学中，恒星在天球上的视运动，是由于恒星自身在空间中的运动与地球自转和公转的相对运动共同作用的结果。

双语例句

  1. Or it is meal cent door fastens a courtyard to distribute, by mess of each courtyard proper motion.
    或是将餐饮分门别院派送，由各院自行用膳。
  2. High proper motion normally indicates a nearby star, so displaying proper motion labels is a quick way of spotting such stars.
    高自行通常表示是一颗近距离恒星，所以显示自行标签是确准此类恒星位置的快捷途径。
  3. Producing haematoma of tumour, head is caused when childbirth, do not require any treatment, heal of metropolis proper motion.
    产瘤、头颅血肿都是分娩时造成的，不需任何治疗，都会自行痊愈。

网络短语

  • proper motion star
    大自行恒星
  • absolute proper motion
    绝对自行
  • annual proper motion
    年自行
  • common proper-motion pair
    共自行星对于；共自行星对
  • reduced proper motion
    简化自行

英英释义

  • The proper motion of a star is its angular change in position over time as seen from the center of mass of the Solar System. It is measured in seconds of arc per year, arcsec/yr, where 3600 arcseconds equal one degree.