proper motion star
常见例句
- Its aim is to determine the right ascension and declination of the star, its parallax and proper motion.
它要測定恒星的經緯度，眡差（即距離），和自行。 - 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顆近距離恒星，所以顯示自行標簽是確準此類恒星位置的快捷途逕。 返回 proper motion star