This suggests that our Solar System isn't a typical planetary system, but a relatively rare one. When we look at planets around other stars, we see that planets of a similar mass to Jupiter are found in Earth's spot.这表明，我们的太阳系不是一个典型的行星系，而是一个相对罕见的行星系。...
There are many planets in the universe. The Earth is a planet that has life. What makes the Earth different from other planets? A. It is very big. B. It has water and an atmosphere. C. It is very hot. D. It is very cold. ...
Pluto, which is no longer considered an official planet, is about 48 AU from the Earth. Because the orbits of the planets are elliptical, the distances change over time. Pluto’s orbit is so eccentric that it can be closer to Earth than Neptune. An astronomical unit is 149,597,870,700 ...
A. Earth is a star. B. Planets don't move. C. Earth moves around the moon. D. Earth moves around the sun. 相关知识点: 试题来源: 解析 D。A 选项“地球是一颗恒星”错误。B 选项“行星不移动”错误。C 选项“地球围绕月亮转”错误。只有 D 选项正确地表达了文中内容。反馈...
Planets as experiments Other planetary bodies can also help to show how frequent Earth-like bodies are in the universe and what, exactly, makes Earth so different from the average planet. Discover the latest in science, tech, and space with over100,000 subscriberswho rely on Phys.org for dai...
So many strange worlds, with no sign of life. Not one other planet similar to our own.有那么多奇怪的世界，却没有生命的迹象。没有任何一个星球与我们的地球相似。So could it be that Earth really is unique? All living things on Earth are made of the same building blocks, long carbon-based...
D. There are strong winds and storms on Uranus.买 系词汇1. at night2. be known as3. be made of4. more than5. act like句型6. Here is what you need to know about them.7. Most of the Earth is covered with water.8. It is the first planet discovered by using a telescope. ...
But what about other Earth-like planets in the galaxy? Do they also have magnetic fields to protect emerging life? A new analysis looks at one type of exoplanet – super-Earths up to five times the size of our own planet – and concludes that they probably do have a magnetic field, bu...
B.other Earthlike planets C.the moon D.another solar system (4) Why are some countries planning to create lunar space stations? A.to find out about the moon's surface B.to lower Earth's population C.to grow food for humans on Earth D.to prepare humans to live on other planets (5...
The planets in our solar system are shown from top to bottom: Mercury, Venus, Earth (and our moon), Mars, Jupiter, Saturn, Uranus, and Neptune. Image courtesy NASA/JPL Please be respectful of copyright. Unauthorized use is prohibited. ...