Even better: Alcor is a spectroscopic binary, too!

开阳伴星也是分光双星！

Remember Mizar and Alcor, the Big Dipper eye test stars?

还记得北斗七星中测试视力开阳星和开阳伴星吗？

The shape of its orbit with its companion offers evidence for the lack of an explosion.

它与伴星轨道形状为没有发生爆了证据。

Many galaxies have companion, satellite galaxies.

许多星系都有伴星——卫星星系。

The newly discovered gravitational mass was identified by observing the motion of its orbiting star.

新发现黑洞引力量是通过观测其伴星运动来确定。

The white dwarf's gravity can pull hydrogen gas from the companion star's surface.

白矮星引力可以将氢从伴星表面拉出来。

The closer to companion stars are in binary stellar systems, the faster they rotate relative to each other.

在双星系统中，伴星离得越近，它们彼此相对旋转速度就越快。

The explosions happen because the white dwarf's gravity has pulled material from a companion star.

爆发生是因为白矮星引力吸引了伴星上。

This was the first planetary defense test of its kind, changing the asteroid's orbit around its larger companion asteroid.

这是第一次此类行星防御测试，改变了小行星围绕其较大伴星轨道。

Astronomers realized that matter from the rotating star was blown off into orbit around its invisible companion.

天文学家发现，旋转恒星上会被吹到它看不见伴星周围轨道上。

Companion star At an angular separation of 3.25 arcseconds is a magnitude 8.76 companion star.

在3.25角秒角距离处，有一颗8.76等伴星。

Anyway, by figuring out the mass and orbital characteristics of the stars whose partners emit x-rays, we can determine how heavy the partners are.

不论如何，通过计算恒星（它们伴星会发射x射线）量和轨道特征，我们可以确定伴星重量。

They also observe systems in which there is only one visible star that is orbiting around some unseen companion.

他们还观察到只有一颗可见恒星绕着一些看不见伴星运行系统。

Scientists can only find them when they are eating away at parts of a partner star or something else falls into them.

科学家们只能在它们吃掉伴星一部分或者其他东西被吸进去时候才能找到它们。

" Usually, we detect them if they are receiving material from a companion star, a process we call accretion, " Bodensteiner said.

“通常，如果它们从伴星接收，我们就会检测到它们，我们称之为吸积过程，”博登斯坦纳说。

At just about the same time, astronomers found that another nearby star, called Gliese 229, had an extremely faint companion.

几乎与此同时，天文学家发现了附近另一颗名为 Gliese 229 恒星，它有一个极其暗淡伴星。

A massive explosion could happen if the companion star's debris falls onto the White Dwarf causing a spectacular fireworks display in the cosmos.

如果伴星碎片落在白矮星上，可能会发生大规模爆，在宇宙中引发壮观烟火表演。

Burdge said, " … when stars die of old age they become white dwarfs - but then this remnant began to eat its companion."

“恒星衰老死亡后会变成白矮星，但随后这些残余开始吞噬其伴星。”

The researchers believe the companion star will become a black hole and could join with the other one after a long period of time.

研究人员认为，伴星会变成一个黑洞，并在很长一段时间后与另一颗相结合。

These binaries are defined as bright systems that usually contain a neutron star or black hole pulling in gas from a closely orbiting star.

这些双星被定义为明亮系统，通常包含一个中子星或黑洞，它从近距离环绕伴星中吸收体。