雅思阅读真题文章之土星.pdfVIP

智 课 网 雅 思 备 考 资 料 雅思阅读真题文章之土星 编辑推荐： 雅思阅读材料之Mars 雅思阅读文章之Nike Jordan 雅思阅读文章之加勒比海的绿宝石 下面是一篇关于土星的雅思阅读真题文章，这篇雅思阅读文章的主 要内容是介绍了关于土星的各个方面，包括了自转和公转，大气和地表 ，温度，密度，卫星，还有壮观的环以及人类的探索等等。下面是详细 内容。 Saturn Saturn is the second largest planet. Only Jupiter is larger. Saturn has seven thin, flat rings around it. The rings consist of numerous narrow ringlets, which are made up of ice particles that travel around the planet. The gleaming rings make Saturn one of the most beautiful objects in the solar system. Jupiter, Neptune, and Uranus are the only other planets known to have rings. Their rings are much fainter than those around Saturn. Saturns diameter at its equator is about 74,900 miles (120,540 kilometers), almost 10 times that of Earth. The planet can be seen from Earth with the unaided eye, but its rings cannot. Saturn was the farthest planet from Earth that the ancient astronomers knew about. They named it for the Roman god of agriculture. Saturn travels around the sun in an elliptical (oval-shaped) orbit. Its distance from the sun varies from about 941,070,000 miles (1,514,500,000 kilometers) at its farthest point to about 840,440,000 miles (1,352,550,000 kilometers) at its closest point. The planet takes about 10,759 Earth days, or about 29 1/2 Earth years, to go around the sun, compared with 365 days, or one year, for Earth. Rotation As Saturn travels around the sun, it spins on its axis, an imaginary line drawn through its center. Saturns axis is not perpendicular (at an angle of 90 degrees) to the planets path around the sun. The axis tilts at an angle of about 27 degrees from the perpendicular position. Saturn rotates faster than any other planet except Jupiter. Saturn spins around once in only 10 hours 39 minutes, compared to about 24 hours, or one day, for Earth. The rapid rotation of Saturn causes the planet to bulge at its equator and flatten at its poles. The planets diameter is 8,000 miles (13,000 kil