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Solar System By: Elizabeth Taylor and Joey Do You Know How Many Moons There Are? • Well with all of the planets moons there are I89 moons! Can you believe it there are 189 moons and out of all those moons we only have one! Uranus, Saturn and Venus • • • • • • It takes Uranus 30,684 days to orbit the sun! In astronomy mythology, Uranus was the lord of the skies and husband of Earth. He was also the king of goods until his son Saturn overthrew him. It takes Saturn 10.759.2 days to orbit the sun. Saturn’s beautiful rings are 169,800 wide, but less thick than a football field. It takes Venus 224.701 days to orbit the sun. Venus was the Roman goddess of love and beauty. In Greek her name was Aphrodite. Asteroids • There are 26 known asteroids larger than 200 km across. We probably know 99% of the asteroids larger than 100 km across. We've cataloged about half of the asteroids in the 10 km to 100 km size range. Scientists still don't know much about the smaller ones. It's thought there may be as many as a million 1 km sized asteroids may exist. The Sun • • The Sun Like all the other planets in our Solar System, the Earth revolves around a mediumsized star. This star provides all the energy necessary to sustain life on Earth. The Suns surface is warm 6,000 degrees Celsius. The same temperature as the Earths core. Pluto, Neptune, Earth • • • • • • It takes 365 days for Earth to orbit the Sun. The Earths name in Greek was Gaea. Earth was the mother of mountains, valleys, streams and all other land forms. She was married to Uranus. It takes 60,190 days for Neptune to orbit the Sun. Neptune was originally the only god of water, but was later extended to the ocean when he became associated with the Greek god Poseidon. It takes 90,465 days for Pluto orbit the sun. Pluto was thought to be the god to whom all men must eventually go. Mercury, Mars, Jupiter • • • • • • It takes Jupiter 4332.59 days to orbit the Sun. Jupiter has 63 moons! It takes Mercury 87.969 days to orbit the Sun. If you moved to Mercury you would way a lot less. If you wayed 70 pounds on Earth you would way 27 pounds on Mercury. It takes Mars 686.98 days to orbit the Sun. Mars excites because its mild temperament is more like the Earth’s than any of the other planets. Jupiter's Moons • Jupiter has at least 63 moons. Most of these moons are very small, and were probably once asteroids that got too close to Jupiter. Jupiter's large size means that it has very strong gravity. This powerful gravity sometimes grabs onto objects that wander too close. Pluto Is It a Planet? • • Pluto is considered The Dwarf planet these days since it is so small compared to all the other planets. Pluto is a small, icy "dwarf planet". Scientists are still unsure as to exactly what it's made of. The Inner Planets • • • The Inner Planets are Earth, Moon, Mercury, Venus and Mars. Mars has permanent ice caps at both poles made up mostly of solid carbon dioxide. We know this as "dry ice.“ Because Venus and the Earth are almost the exact same size, you would weigh almost exactly the same on either planet. If you weighed 70 pounds on Earth you would weigh 63 pounds on Venus. The Outer Planets • • • The Outer Planets are Jupiter, Saturn, Uranus, Neptune and Pluto. Neptune has 8 known moons; 7 small ones and a large moon called "Triton.“ Uranus has 15 known moons. Voyager 2 discovered 10 small moons in addition to the 5 large ones already known. It is likely that there are many more tiny moons within the rings. The Websites We Used • • • http://www.kidsastronomy.com/solar_system.htm http://kids.nineplanets.org/ http://solarsystem.nasa.gov/planets/profile.cfm?Object=SolarSys&Dis play=Kids