六级冲刺备考阅读练习22_大学英语阅读

六级冲刺备考阅读练习22

　　Uranus is the seventh planet form the Sun. The name Uranus comes from Greek mythology. Uranus was the God of the Heavens.〃

　　Uranus is situated one thousand seven hundred and eighty two miles form the Sun and completes one orbit around the Sun every eighty-four years. The size of this planet is four times that of earth, but has the same force of gravity on the surface as earth. There are five moons that orbit this planet. The largest one is Titania.

　　Neptune, the eighth planet from the Sun, is invisible to the naked eye. It is located some two thousand seven hundred and ninety-three million miles form the Sun. A single orbit around the Sun takes one hundred and sixty-five yeas to complete. This planet only receives one nine-hundredth of the heat and Sunlight as the earth.

　　Pluto was the ninth planet from the Sun. The name Pluto comes from the Roman God who was the ruler of the under world. On Thursday, August 24, 2006, however, the International Astronomical Union met in Prague voted finalizing the guidelines of planetary classification, thus reorganizing Pluto into a new category of dwarf planet.

　　Pluto is located three thousand six hundred and seventy million miles form the Sun. It orbits the Sun in total darkness, and is about the same size as Mars and has a diameter two thirds that of Earths moon. Due to the distance and size of Pluto, it can only be seen with the use of a twenty-inch telescope.