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。...
"We're trying to get to the point where we can characterize planets that are like the Earth, and hopefully, someday find life on one of them," said co-author Laura Schaefer, a planetary scientist at Stanford Earth who studies exoplanets. Chances are it will be something more like bacteria...
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...
But due to the sun's energy over long periods of time, the cores of planets closer to it couldn’t hold on to light gases very well, so they remained small rocky planets like earth.Meanwhile, though the planets farther out from the sun, their gravitational force kept on pulling in gas...
{{B}}Text 2{{/B}}What kind of planet might NOT support life A.Most of the planets of the stars.B.Stars similar to our sun.C.Planets similar to the earth.D.Planets with proper conditions. 相关知识点: 试题来源: 解析 A 见第六段:First,eliminate those stars that are not like...
She has a personality that shines like the Sun. 3 Earth A celestial body supporting various forms of life. Earth's atmosphere makes it unique in the known universe. 2 Sun An object around which planets orbit. Mercury is the closest planet to the Sun. 2 Earth The substance of the land ...
【解题思路】根据第一段中的"If there is life on another planet,what is it like? This is the question that a new science fictiondocumentary(科幻纪录片),Alien Planet,tries to answer"可知Alien Planet将告诉我们外星生命会是什么样子,故选C项。2.C【命题意图】考查细节理解。【解题思路】根据第二段中...
C. The rings around Saturn are made of three kinds of things. 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....
So molecules like this ended up on Earth. In fact, what we call meteorites are pieces broken away from comets and asteroids that came in our atmosphere and left their extra-terrestrial organic matter on the surface of primitive Earth.这样的分子最终来到了地球上。事实上，我们所说的陨石是来自彗星...
It looks and acts like most planets. But in 2006, scientists changed their idea.()21. Which planet is the hottest in our solar system? A. Venus. B. Mercury. C. Earth. D. Mars.()22. The underlined word "They" in Paragraph 7 refers to _ A. Rings B. Planets C. Rocks D. Moons...