Astronomers think it's a failed dwarf galaxy that lacked the requisite mass to produce stars.

天文学家们认为它是缺乏必要存在物而不能产生新星的已经衰败的矮星星系。

The universe becomes dimmer and dimmer, illuminated only by smaller red and white dwarfs.

宇宙会变得越来越暗淡，仅由较小的红矮星和白矮星照亮（快烧尽的太阳灰渣）。

And in the center is a white dwarf.

中间是一颗白矮星。

They saw Lupin, Ron, and Pettigrew clambering awkwardly out of the hole in the roots.

他们看见卢平、罗恩和小矮星彼得从柳树下面的洞里笨拙地钻出来。

Harry watched Lupin, Pettigrew, and his father join Lily and Sirius at the Gryffindor table.

哈利看见卢平、小矮星彼得和自己的父都被分到格兰芬多学院了。

Or, it seems, when you're cruising past a white dwarf star.

以说在你缓慢驶过一颗白矮星时。

White dwarfs—the ultimate destiny of stars like the sun—maximize the pollution signal.

类似太阳一样终极命运的恒星白矮星使得污染的信号最大化。

Experts believe billions of planets orbit red dwarf stars.

专家认为，有数十亿颗行星围绕着红矮星运行。

Smaller stars like the sun leave behind what are called white dwarves.

像太阳这样较小的恒星会留下白矮星。

White Dwarf stars sometimes have other stars orbiting nearby.

白矮星附近有时候有别的恒星环绕。

Peter Pettigrew? - Little lump of a boy.

小矮星彼得 -矮矮胖胖的。

But then you could have two objects the same mass, and which look exactly the same, yet one would be a planet and one a brown dwarf, depending on how they formed.

但是你能会发现两个相同质量的物体，它们看起来完全一样，而一个是行星，一个是褐矮星，这取决于它们是如何形成的。

" Relashio! " said Ron, pointing the wand at the silver hand, but nothing happened; Pettigrew dropped to his knees, and at the same moment, Hermione gave a dreadful scream from overhead.

“力松劲泄！”罗恩说，用魔杖瞄准银手，但也没用；小矮星彼得跪了下去。这时，赫敏发出一声最怕的尖叫声。

Since white dwarfs are so tiny compared to your average star, they don't give off very much light, and continue to slowly get dimmer and colder over billions of years.

由于白矮星普通恒星相比太小了，它们不会发出太多的光，并且在数十亿年的时间里继续慢慢变暗和变冷。

In all, there may be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs in the Milky Way.

总的来说，银河系中能有多达 400 亿地球大小的行星在类太阳恒星和红矮星的宜居带运行。

And the Earth's hellish fate isn't over. As a red giant, the Sun will fluctuate in size before collapsing into a white dwarf.

地球的地狱般的命运还没有结束。作为一个红巨星，太阳在崩塌成白矮星之前体积将会发生动。

These are hundreds of tons per cubic-inch dense as all the mass is packed in a sphere of just 1000 of miles in diameter.

白矮星的密度高达每立方英寸数百吨，因为所有的质量都聚集在一个直径只有1000英里的球体中。

Astronomers say a red giant's release of hydrogen in a binary system causes a heavy buildup of pressure and heat on the white dwarf.

天文学家表示，在双星系统中，红巨星释放出的氢会在白矮星上造成巨大的压力和热量积累。

The attack on the Fat Lady—entering Gryffindor Tower with a knife—without Pettigrew, alive or dead, we have no chance of overturning Sirius's sentence.”

对胖夫人的袭击。带刀进入格兰芬多塔楼，没有小矮星彼得，不管是活的还是死的，我们就没有办法推翻对小天狼星的判决。”

But after eight billion years the sun will have finally become a White Dwarf star equal to fifty-four percent of its current mass.

但 80 亿年后，太阳最终会变成一颗白矮星，其质量相当于目前太阳质量的 54%。