spectroscopic binary

基本解釋

A spectroscopic binary star, 245 light-years from Earth, one of the brightest stars in the sky and the brightest star in the constellation Virgo.
一種用分光鏡觀察的距地球245光年雙星，是天空中最亮的恒星之一，也是処女座中最亮的星星。
odict.net
In addition, spectroscopic observations with ground-based telescopes further reveal that one of the stars is actually a tight binary that is too compact to be resolved even by Hubble.
另外，地麪望遠(yuǎn)鏡的分光鏡觀察結(jié)果進(jìn)一步揭示出它們其中的一顆恒星實(shí)際上是一對(duì)緊密的雙星組成的，它們距離太近以至於哈勃望遠(yuǎn)鏡不能區(qū)分出來(lái)。