Planets orbit their parent stars while separated by enormous distances – in our solar system, planets are likegrains of sandin a region the size of a football field. The time that planets take to orbit their suns have no specific relationship to each other. But sometimes, their orbi...
Which place on earth has highest gravity? Mount Nevado Huascarán in Peru has the lowest gravitational acceleration, at 9.7639 m/s2, while the highest is at the surface of the Arctic Ocean, at 9.8337 m/s2. Do all planets have gravity? Yes! Anything that has mass has gravity. The more ma...
Do you believe there is life on other planets? So far scientists haven't found aliens (外星人) yet. But they have found an Earth - like planet. Last month, with a big telescope, European scientists found a planet a long way outside the solar system. They say in some ways it is ...
In order for plants to reproduce,they have to spread their seeds(种子) to other areas. Plants have developed all kinds of ways to do this. The simplest way is gravity. Many seeds are inside of fruit. When a piece of fruit gets too heavy,it falls from a tree to the ground. Sometimes...
Do you believe there is life on other planets? So far scientists haven't found aliens(外星人)yet. But they have found an earth-like planet. Last month, with a big telescope(望远镜), European scientists found a planet a long way outside the solar system. They say in some ways it is ...
Why do terrestrial planets have so little molecular hydrogen? Terrestrial Planets: Terrestrial planets in our solar system are the closest to the sun. The four planets that make up the terrestrial planets are mercury, venus, earth, and mars. Some other planets outside our solar system are also...
Do all planets have a spherical shape? All of the planets are round because of gravity. ... The force of gravity, pulled this molten material inwards towards the planet's center into the shape of a sphere. Later, when the planets cooled, they stayed spherical. Planets are not perfectly ...
These particles contracted under gravity to create planetesimals, which collided with one another to become the solid inner planets. Meanwhile, gases froze into giant balls that would build the outer gas giants. Why did rocky planets form closer to the sun and the gas giants farther away? One ...
【题目】阅读理解Do you believe there is life on other planets? So far scientists havent found aliens(外星人) yet. But they havefound an earth-like planet.Last month, with a hig telescope (望远镜), European scientists found a planet a long way outside the solarsystem. They say in some ...
Why all planets revolve around the Sun? Anyway, the basic reason why the planets revolve around, or orbit, the Sun, isthat the gravity of the Sun keeps them in their orbits. Just as the Moon orbits the Earth because of the pull of Earth's gravity, the Earth orbits the Sun because of...