Year after year we see it up in the sky, burning brightly, giving us heat and light. The Sun certainly doesn't seem to be getting old or weak. But stars do burn out and die after billions of years. As a star's gases burn, they give off light and heat. But when the gas runs ...
Do you know how many stars there are in the universe? The answer is MANY! Our sun is one of about 100 billion stars in our galaxy, the Milky Way. But the Milky Way is just one of billions of galaxies that we know about! Some other scientists say there are 2,000,000,000,000,000...
The observable Universe measures 13.8 billion light-years in all directions. What this means is that at the very edge of what we can see, is the light left that region 13.8 billion years ago. Furthermore, the expansion of the Universe has carried to those regions 46 billion light-years awa...
How many stars are there in the Milky Way? Milky Way. Image credit: NASA According to astronomers, our Milky Way is an average-sized barred spiral galaxy measuring up to 120,000 light-years across. Our Sun is located about 27,000 light-years from the galactic core in the Orion arm. As...
阅读理解。 Do you know how many stars there are in the universe? The answer is WANY! Our sun is one of about 100 billion stars in our galaxy the Milky Way. But the Milky Way is just one of billions of galaxies that we know about!
How fast is a light year? How long is a day on the moon? How many light minutes are there in one astronomical unit? How many miles does the Earth travel around the Sun in a year? How far can light travel in one year? How far is the Moon in light years from Earth?
Many think it's likely you would just keep passing galaxies in every direction, forever. In that case, theuniversewould be infinite, with no end. ... Scientists now consider it unlikely the universe has an end – a region where the galaxies stop or where there would be a barrier of som...
How the Universe Works《了解宇宙是如何运行的(2010)》第六季第六集完整中英文对照剧本.docx,我们银河系的命运悬而未决 The fate of our galaxy hangs in the balance. 银河系正在消亡,而我们不知道是什么原因 The Milky Way is dying, and we dont know why. 我们的星
它在十亿光年之外 It was over a billion light-years away. 如果它离我们那么远,却是那么亮 If its that far away and as bright as it was, 那么它一定是宇宙中最亮的物体了 this must be the most luminous known object in the universe. 这就是为什么这些东西在这么长时间里 And this is one of ...
How the Universe Works《了解宇宙是如何运行的(2010)》第九季第十集完整中英文对照剧本.docx,观察宇宙首先用到的是光,可见光 First there was light, visible light. 然后我们用无线电和X射线观察宇宙 Then, we viewed the universe in radio waves and X-rays. 自从天