How was the solar system built? (cover story)The article discusses the story of the birth of the solar system. A story reveals that they are blood siblings, all created from the same molecular cloud whose collapse formed the sun. It says that when the sun formed, it swallowed about 99.8...
C.It was a disk-shaped region of water vapor made from ice vaporized by heat from a central sun. D.It was a cloud of dust grains, which collected in the hotter outer reaches of the cloud. As the dust grains were falling down into the solar disk,they began to collide and stick toget...
(海王星)and Uranus(天王星)are all ___ than the earth,___ Venus,Mars and Mercury are smaller than the earth.Animals,trees and humans can only ___ on the earth—the other planets in our solar system do not ___ air or water.Do any planets in other galaxies have ___?We don't know...
It was predicted that with the development of technology, people would have more free time in 21st century. To what extent do you think the prediction has come true? Give reasons for your answer and include any relevant examples from your own knowledge or experience. Write at least 250 words...
Dmatter orbiting in different planes was pulled by tidal forces into nearly the same plane 3 An entirely different model is now thought to describe the most likely series of events that led to our present solar system. The central idea of this model dates to the late 1700s, when the Germa...
百度试题 结果1 题目Our Solar System is 4.6 billion years old, but how old is the Earth?相关知识点: 试题来源: 解析 4.5亿年或4.5 billion years 反馈 收藏
Based on the predominant model of Solar System formation, scientists assert that several billion years ago, our Solar System was nothing but a cloud of cold dust particles swirling through empty space. This cloud of gas and dust was disturbed, perhaps by the explosion of a nearby star (a sup...
While originally applied only to the Solar System, the SNDM was subsequently thought by theorists to be at work throughout the Universe, and has been used to explain the formation of many of the exoplanets that have been discovered throughout our galaxy....
Core accretion was first postulated in the late 18th century by Immanuel Kant and Pierre Laplace. Nebula theory helps explain how the planets in our solar system were formed. But with the discovery of "Super-Earth" planets orbiting other stars, a new theory, known asdisk instabilitywas proposed...
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