Paragraph 1:In order to understand the origin of Earth's atmosphere, we must go back to the earliest days of the solar system, before the planets themselves were formed from a disk of rocky material spinning around the young Sun. This material gradually coalesced into lumps called planetesimals...
One possibility is that a supernova occurred close to the cloud that became the Sun just before the Sun formed; it is even possible that the blast wave from this explosion triggered the collapse of the gas cloud that became the Sun and solar system. Supporting evidence for this idea comes ...
Our planetEarthis part of asolar systemthat consists of eight planets orbiting a giant, fierystarwe call the sun. For thousands of years, astronomers studying the solar system have noticed that theseplanetsmarch across the sky in a predictable way. They've also noticed that some move faster t...
Around the protostar, a large flat discof dust, rock, and ice, which would become the planets, moons, and asteroids in the solar system, collected.This initial stage in the formation of the solar system lasted approximately 100,000 years. Next,the planets formed through the process known as...
Determining the Ages of the Planets and the Universe The planets of our solar system all revolve around the Sun in the same direction and in orbits that lie in nearly the same plane. This is strong evidence that the planets formed simultaneously from a single disk of material that rotated...
This evidence suggests that water was around in the region of space that would become the solar system before the planets and star even formed. “We can now trace the origins of water in our Solar System to before the formation of the sun,” said Tobin. ...
AThe solar system formed from a cloud of gas and dust. BThe solar nebula was massive compared to today's Sun. CThe planets formed from the less-dense parts of the solar nebula. DThe rotation of the solar nebula forced most of its mass to its outer edges. ...
But this definition of the solar system is considered to be far too simple by some astronomers, such as Caltech's Mike Brown. "It's not really true," Brown told Live Science in an email. "Things have moved around a lot — mostly outward — since the planets were formed." This mean...
But the largest planets are not Earth-like, one of which is Jupiter. In the solar system no planet is larger than Jupiter. Ancient scientists named the planet after the king of the Roman gods. Jupiter is the fifth closest planet to the sun. It lies after Mars but before Saturn. The ...
The details of how the planets formed in the Solar System is 还不完全了解 这是科学研究的前沿课题 not fully understood. It's cutting-edge scientific research. 因为那毕竟是在45 亿年前发生的事 We're talking about events that happened over 4.5 billion years ago, ...