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的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.

它与伴星的轨道形状为没有发生爆炸提供了证据。

Many galaxies have companion, satellite galaxies.

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.

新发现的黑洞的质量是通过观测其伴星的运动来确定的。

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

白矮星的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，它们彼此相对旋转的速度就越快。

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

爆炸的发生是因为白矮星的了伴星上的物质。

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的轨道。

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

天学家发现，旋转恒星上的物质会被吹到它看不见的伴星的周围轨道上。

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

在3.25角秒的角距离处，有一颗8.76等的伴星。

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（它们的伴星会发射x射线）的质量和轨道特征，我们可以确定伴星的重量。

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的伴星运行的系统。

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的一部分或者其他东西被进去的时候才能找到它们。

" 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物质，我们就会检测到它们，我们称之为积过程，”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，天学家发现了附近的另一颗名为 Gliese 229 的恒星，它有一个极其暗淡的伴星。

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

如果伴星的碎片落在白矮星上，可能会发生大规模爆炸，在宇宙中发壮观的烟火表演。

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，但随后这些残余物开始吞噬其伴星。”

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的系统，通常包含一个中子星或黑洞，它从近距离环绕的伴星中收体。