The Galaxy consists of 100 billion stars.

银河系由1千亿颗恒星组成。

《柯林斯英汉双解大词典》

Upwards of a billion stars in our galaxy have burnt up their internal energy sources, and so can no longer produce the heat a star needs to oppose the inward force of gravity.

在我们的星系中，超过10亿颗恒星已经耗尽了它们的内部能量来源，因此无法再产生恒星所需的热量来对抗向内的引力。

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Or that there are over 200 billion stars in the Milky Way?

或者解释解释现在在银河系中有2千亿颗恒星？

youdao

And though it may sound incredible, your body actually contains about a teaspoon's worth of this stuff formed thirteen billion years ago by the very first stars."

VOA: special.2010.09.29

Astronomers think our galaxy contains at least 100 billion stars, and perhaps as many as 400 billion.

MSN: New Milky Way photo captures 1 billion stars

Centaurus A is immense, perhaps 50 times larger than the Milky Way, home to the Earth and about 100 billion stars.

BBC: Hubble spies black hole gobbling galaxy

More than a billion stars blaze bright in a new photo of our Milky Way galaxy snapped by an international team of astronomers.

MSN: New Milky Way photo captures 1 billion stars