As that gas collapsed to a black hole, it pulled in more gas and dust from the disc, bulking up to a billion solar masses.
中心气体坍缩成黑洞后,会从气盘中吸入更多的气体和尘埃,达到十亿个太阳质量。
3
In a dark room nine black human skulls on stands, each lit from below by bright lights, are aligned with a round, mobile mirror on one side and a glass disc on the other.