The Sun is the hub of a huge rotating system consisting of nine planets, their satellites, and numerous small bodies, including asteroids, comets, and meteoroids. An estimated 99.85 percent of the mass of our solar system is contained within the Sun, while the planets collectively make up mos...
As you know, it's believed that Saturn, and all the planets in our solar system coalesced from a swirling cloud of gas some 4.8 billion years ago. However, if the rings are made of leftovers from that process, then they'd also be about 4.8 billion years old. ...
Narrator: Listen to part of a lecture in an astronomy class. 旁白:听一个天文学相关的讲座。 Professor: OK. We've been discussing the planets in our solar system and how some of the ones farthest from the sun were discovered. 教授:好,我们一直在讨论我们太阳系中的行星,以及距离太阳最远的一些...
The solar system is made up of the sun, eight planets, moons, asteroids, comets, and other celestial bodies. The sun is a massive star that provides light and heat to the planets. The eight planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptu...
A. Rock and gas. B. Gas and water. C. Rock and water.( )25. There are ___ planets in our solar system besides Earth and Saturn. A. 7 B.8 C. 9 3 In our solar system ( 太阳系 ), Earth and the other eight planets travel around the sun.. Unlike Earth, Saturn ( 土星 ) ...
We believe our solar system began as a huge spinning cloud of dust and gas, which flattened and eventually collapsed in on itself. The matter it's centered condensed into a ball of hot gas and dust, eventually becoming our sun. And what happened to the remaining cloud?To the disk enci...
The planets in our solar system Venus has continents, mountains, and craters. The planets in our solar system The planets in our solar system Earth is the only planet in the solar system that has life…as far as we know! The planets in our solar system The planets in our solar system ...
The earth is the only planet that scientists are certain has life. What does the earth have that other planets in our solar system don't? For one thing,the earth is just the right temperature. As 61third planet from the sun ,
81 Saturn(土星) is the sixth planet from the sun in our solar system. It is the second-largest planet in our solar system (Jupiter is the largest). It has beautiful rings that are made mostly of ice chunks (and some rocks) that range from the size of a fingernail to the size of ...
In our solar system(太阳系), Earth and the other eight planets travel around the sun. Unlike Earth, Saturn(土星)has rings. The chart shows more ways in which Saturn and Earth are different. Category(类别) Earth Saturn Average distance from the sun 93 million miles 890 million miles ...