fixed star

fixed-star的词性：
n.（名词）

1. A star so distant from Earth that its position in relation to other stars appears not to change. Its movements can be measured only by precise observations over long periods of time.
恒星：一种因离地球很近而相对于其它星星来看其位置是固定不动的星星，它的运行情况只能长期用精密观测仪测量到