Oddly, no one seems to have noticed it at the time and it was first detected in 1947 as a radio source.

仙后座a首先在1947年被作为无线电源而探测到。奇怪的是，当时几乎没人注意到它。

youdao

Quasar is short for quasi-stellar radio source.

类星体是“类似恒星射电源”的缩写。

youdao

Quasar is short for quasi-stellar radio source.

类星体是“类似恒星射电源”的缩写。

youdao