星系,银河系,太阳系 – Galaxies, the Milky Way and the Solar System – 双语阅读

2019.07.03
星系,银河系,太阳系 – Galaxies, the Milky Way and the Solar System – 双语阅读

宇宙的奥秘总是令人向往,人们不断发现探索出新的信息。本短文将介绍宇宙中存在着的三种物质。首先是星系一个受引力束缚系统包括恒星,恒星残骸,星际气体和尘埃,暗物质。宇宙中可观测到的大约有1700亿个星系。想象宇宙是多么巨大!

The universe holds so many mysteries for us human beings. Its enormous size invites people to keep learning and finding out new information about it. Today, we will learn about three basic structures in the universe. Let’s start with number one: galaxies. A galaxy is a gravitationally bound system consisting of stars, stellar remnants, interstellar gas and dust, and dark matter. There are approximately 170 billion galaxies in the observable universe. Can you imagine how huge that is?

数以亿计的星系总称为银河系,其中就包括了我们的太阳系。银河系的英语是Milky Way ,因为它看上去就像打翻的牛奶(Milk)。银河系中有数以亿计的星球,比地球大的就至少有170亿。

Of those billions of galaxies, one is called the Milky Way. It is the galaxy that contains our solar system, where Earth is located. It is called the Milky Way because the disk of the galaxy runs across the sky as a band of glowing light, like spilled milk. Astronomers estimate that there are between 100 and 400 billion stars in the Milky Way, and think that each star has at least one planet. So there are likely hundreds of billions of planets in the Milky Way, and at least 17 billion of those are the size and mass of Earth.

我们的太阳位于银河系主要两条旋臂的其中一条:猎户臂。太阳系是以太阳为中心,和所有受到太阳的引力约束天体的集合体。太阳离银河系中心大约2.4万光年。因此,我们可以想象太阳绕着银河系转,我们的地球他、绕着太阳转。宇宙中的所有物质都是围绕的另一个物质转的。是不是很神奇?

The Sun is located in the Orion Arm, a region of space in between the two major arms of the Milky Way. The Sun and all the objects that orbit it, either directly or indirectly, form the solar system. It takes the Sun about 240 million years to orbit the Milky Way once.

So imagine this: the Sun orbits around the Milky Way, and Earth orbits around the Sun. Everything in the universe orbits around something, or is orbited around by something else … or both! It paints a huge, complex, beautiful picture, doesn’t it?