Saturn is a funny-looking planet. It has beautiful rings. Of all the planets in the solar system, Saturn’s rings are the biggest and brightest. According to scientists, however, these rings will one day disappear completely. ②How did Saturn get its rings in the first place? Science ...
Select the correct answer. Earth's oxygen atmosphere is thought to: 1. have been present since the planet first formed. 2. is thought to have been produced by volcanic eruptions. 3. is thought to have formed through the photosynthetic activity of oak fore ...
carbon-based life on Earth. But the elements are still products of stars and would still be present in planetesimals everywhere. No matter what kinds of life we are looking for, we are likely to find the necessary elements on almost every planet, moon, asteroid, and comet in the universe....
Saturn is a funny-looking planet. It has beautiful rings. Of the planets in the solar system. Saturm's rings are the biggest and brightest. According to scientists, however, these rings will one day disappear completely.How did Saturn get its rings in the first place? Science has no sure...
First of all, astronomers look for a star. That’s because our own Earth moves around a star—the Sun. More importantly, it is neither too far from nor too near to the Sun for heat and light. So when astronomers have found the star, they look at the planets around it. In recent ...
Saturn is a funny-looking planet.It has beautiful rings.Of the planets in the solar system.Saturn's rings are the biggest and brightest.According to scientists,however,these rings will one day disappear completely. How did Saturn get its rings in the first place?Science has no sure answer....
by carbon-based life on Earth.But the elements are still products of stars and would still be present in planetesimals everywhere.No matter what kinds of life we are looking for, we are likely to find the necessary elements on almost every planet, moon, asteroid, and comet in the universe...
Some scientists are examining the potential for harvesting icebergs form Antarctica, which is estimated to have the biggest reserves of fresh water on the planet. 出自-2016年12月阅读原文 Most of them take jobs which don't require a college degree. 出自-2016年12月阅读原文 Many of the world's...
Saturn is the second biggest planet in the solar system. Saturn’s rings are made of dust and ice. In Roman mythology Saturn is the god of time, because this planet moves slowly. 1. When you look up into the night sky, which is the brightest planet?
No matter what kinds of life we are looking for, we are likely to find the necessary elements on almost every planet, moon, asteroid, and comet in the universe. [#paragraph5]A somewhat stricter requirement is the presence of these elements in molecules that can be used as ready-made ...