In the first study, the erratic, unpredictable behavior of the supermassive black hole within the Andromeda galaxy puzzled researchers studying it.

在第一项研究中，仙女座星系内特大质量黑洞的这种不稳定的，变幻莫测的表现让所有科研人员感到困惑。

youdao

Researchers used data from the Hubble Space Telescope to look more closely at the black hole, and found that the supermassive black hole in the M87 galaxy is, in fact, displaced from the center.

科研人员根据已有数据，通过哈勃太空望远镜更近距离的观察这个黑洞。发现M87星系的特大质量黑洞已经移出了中心位置。

youdao

The supermassive black hole at the center of NGC 3115, they calculate, has a mass of about 2 billion Suns, making it the nearest billion-solar-mass black hole to Earth at 32 million light-years away.

据推算，NGC3115中心的超大质量黑洞，距地球3200万光年，质量相当于太阳质量的20亿倍。这也使它成为距地球最近的“10亿太阳质量级别”黑洞。

youdao

Even more fascinating, the supermassive black hole is about 14% of the total mass of the galaxy.

FORBES: Astronomers Find One Of The Biggest Supermassive Black Holes Yet

The astronomers had suspected that the supermassive black hole was spewing out plasma jets in a winding corkscrew, and they say that their observations have now confirmed just that.

BBC: Black holes reveal more secrets

Astronomers have measured the rate of spin of a supermassive black hole for the first time - and it is big.

BBC: First glimpse of a black hole's spin