Our place in the universe: 銀河系 2000 億顆恆星中的一顆。因此，科學家估計我們的銀河系中可能有多達 3.2 兆顆行星。

我們在宇宙中的位置：

我們的太陽繞銀河系一周需要 2.5 億年。

最終，銀河系的跨度約為 10 萬光年，厚度約為 1,000 光年。我們的太陽系距離銀河系中心約 26,000 光年。

如果這還不夠令人印象深刻的話，我們的恆星只是銀河系 2000 億顆恆星中的一顆。因此，科學家估計我們的銀河系中可能有多達 3.2 兆顆行星。

請記住，這些只是我們自己這個微小星系的數字。據美國宇航局稱，可觀測宇宙中大約有 2 兆個星系。

了解更多：

圖片來源：加州理工學院/Jolene Creighton

 Our place in the universe:

It takes our Sun 250 million years to orbit the Milky Way.

Ultimately, the Milky Way is about 100,000 light-years across and 1,000 light-years thick. Our solar system is located about 26,000 light-years away from the center of the galaxy.

If that's not impressive enough, our star is just 1 of the 200 billion stars in the Milky Way. As such, scientists estimate that there could be as many as 3.2 trillion planets in our galaxy.

And keep in mind, these are just the numbers for our own tiny galaxy. According to NASA, there are about 2 trillion galaxies in the observable universe.

Learn more:

Image credit: Caltech/ Jolene Creighton

所有心情：

7,9117,911