Which came first, the quasar or the galaxy?

类星体和星系哪一个形成在前呢？

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In our current picture, as every galaxy forms and collapses, it has a brief quasar phase.

在我们目前所掌握的星系建立和毁灭的图景中，存在着一个短暂的类星体阶段。

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Scientists were checking out a quasar, an incredibly distant, incredibly bright object. This quasar was the only one without a known host galaxy.

科学家们在研究一种距离遥远，亮度超常的类星体，它是唯一没有已知宿主星系的恒星状球体。

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Chris Carilli, of the National Radio Astronomy Observatory in Socorro, New Mexico, points out that the quasar-based method to measure the ancient value of alpha is at least 30 years old, and has never before resulted in a value different from today's alpha.

ECONOMIST: Fundamental physics

Just as in a container, molecules in an inter-galactic gas cloud absorb certain wavelengths and leave a pattern of dark lines on a quasar's spectrum.

ECONOMIST: Fundamental physics