write at least one characteristics of each planet

  1. Mercury is named after the messenger of the gods of ancient Rome. It is the smallerst planet. Its surface temperature is about 427 C. Mercury is a dry, barren planet. Because it has very little atmosphere, falling meteors would crash full force into its surface.
  2. Venus it is the brightest planet in the sky. It appears in the east as the morning star and as evening star and in the west. The surface temperature on Venus is about 462 C. The atmosphere is made up mostly of carbon dioxide. There is liquid water and oxygen.
  3. Earth is the only planet known to have living things. Its atmosphere is composed mostly of oxygen and nitrogen. The earths atmosphere protects it from the suns harmful rays. The atmosphere also keeps heat as well as water from escaping into space. Earth is a rocky planet. Beneath its surface lie solild iron and nickel surrounded by rocks. Temperatures range from as high as 7,000 C to about 870 C.
  4. Mars the planet Mars is similar to earth in some ways. It has seasons, an approximately 24 hour day, and an atmosphere with clouds and icecaps. The atmosphere on Mars contains only small amount of oxygen. Mars has two moons Deimos and Phobos.
  5. Jupiter is the biggest of all the planets. It temperature can be as high as 30,000 C. Jupiter is made up of gas, liquid, hydrogen and helium. Sixteen moons orbit Jupiter. The four largest are the Galilean moons, name after Galileo Galilei, the Italian astronomer who first observed the Galilean moons in 1610. A thin ring of fine dust particles surrounds Jupiter.
  6. Saturn has a hot, solid inner core of iron and rocky material. Its temperature averages 178 C. Seven rings encircle Saturn at the equator. The rings are thin and flat. Each rings consists of ice particles arranged in ringlets and bands. Some rings are wary while others are sharp-edge. Saturn has 18 moons. Phoebe is the farthest moon. It orbits Saturn at a distance of about 12,950,000 kilometers. Saturns largest satellite is Titan. It is 1 ½ time as large as the earths moon. It is even larger than Mercury and Pluto. Titan has an atmosphere consisting mostly of nitrogen.
  7. Uranus was discovered in 1781 by Willian Herschel. Unlike Jupiter and Saturn, Uranus does not seem to have an internal source of heat. The planets temperature is about 216 C. Uranus has 15 moons. They all orbit near the plane of the planets equator. Uranus also has 11 thin rings surrounding it. The rings consist of chunks of unknown black material.
  8. Neptune was discovered in 1846 by two astronomers, Adams and Leverrier. Its composition is similar to that of Uranus. There is a central core of rock and ice. Neptunes atmosphere is gaseous. Neptune has a ring system. It consists of one faint ring and three bright rings. Neptune has eight moons. One of these is triton. It is the only major satellite that orbits opposite the planet it orbits around. Triton has the coldest temperature in the solar system, 235 C.
  9. Pluto was discovered in 1930 by the Lowell Laboratory. The size of Pluto is less than a fifth the size of the earth. It is the smallest planet in the solar system. Pluto is a solid planet composed mostly of rocky material and ice. Its temperature is estimated to be avbout 228 V. It has one satellite, Charon. Charon is the largest satellite in the solar system
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