Planets of the solar system kevin yu
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  • 1. Planets of the Solar System By: Kevin Yu Science 8C
  • 2. General Information
    • All the planets in The Milky Way revolve around the sun. ( Circling around)
    • Most/all the planets and moon rotate on themselves. ( Spin on own axis)
    • All these planets have their own gravity, the bigger the mass is the more gravity a planet/moon has.
    • A mass will become a planet if it has a round enough shape, revolves around the sun, and has its own gravity.
  • 3. Inner/Outer Planets
    • There are 8 planets in our solar system, Mercury, Venus, Earth, and Mars are inner planets, and Jupiter, Saturn, Uranus, and Neptune are the outer planets, as well as 3 dwarf planets.
    • These inner and outer planets are seperated by the asteroid belt.
    • Inner planets are often filled with craters from the many asteroids crashing it.
    • While inner planets are made of solid rock, outer planets are mostly made out of gases.
  • 4. Inner Planets
  • 5. Mercury
    • Mercury’s atmosphere is not substantial because it’s too close to the sun, and it contains helium and sodium.
    • Mercury is the closest to the sun. It can reach up to 427 ° c when facing the sun, and below -183 °c when facing away from the sun.
    • Mercury has no atmosphere and is shaped by volcanos, tectonic plates, and asteroid and meteor impacts.
  • 6. Venus
    • Venus is also known as “The Evening Star” from Earth because of the light its cloud reflects.
    • A year in venus is even longer than a day at venus because of its slow rotation. Venus has a retrogade rotation, meaning it rotates the opposite direction from Earth, resulting the sun to rise from west to east there.
    • You would think Mercury is the hottest planet since it’s closest to the sun, but Venus is. Its greenhouse effect traps the heat in the planet.
  • 7. Earth
    • Our atmosphere contains 21% oxygen, 78% nitrogen, 0.9% argon, and 0.1% other elements. The atmosphere protects us from solar radiation and most meteors.
    • Earth lies on a 23.5 degree angle tilt, giving us seasonal variations. Earth also has a magnetic field produced from the molten metal inside Earth, and Earth’s fast rotation.
    • The Moon is the natural satellite of Earth and is often seen at night.
  • 8. Mars
    • M ars looks generally red because of the iron rich soil laying there.
    • Mars is also believed to have life because of tiny bacteria found from there.
    • 95% of Mars’s atmosphere is carbon dioxide.
    • Mars also has the largest volcano in our solar system which is “Olympus Mons”. It is 26KM tall.
    • Mars also has 2 natural satallites which are Phobos and Deimos.
  • 9. Outer Planets
  • 10. Jupiter
    • Its flat poles and bulgy equator makes it rotate very fast.
    • Jupiter’s atmosphere contains hydrogen, helium, sulfur, and nitrogen.
    • There is a giant red spot on Jupiter believed by scientists to be a huge hurricane.
    • Jupiter has over 50 natural satellites and one of them, Io, has volcanic activity on it.
  • 11. Saturn
    • Saturn’s atmosphere consists of hydrogen and helium.
    • Saturn has a large rings of ice and dust believed to be formed by the break up of nearby satellites.
    • Saturn has long seasons because it takes about 29.5 years to complete on revolution.
    • Saturn has such a low density, it can even float on water.
  • 12. Uranus
    • Uranus, unlike other planet has a tilt of 98 ° and practically rotates horizontally.
    • Uranus’s atmosohere includes hydrogen, helium and methane.
    • Uranus has up to 27 known natural satellites.
  • 13. Neptune
    • Neptune has an atmosphere of ammonia, helium, and methane.
    • Neptune has 13 known natural satellites.
    • Neptune’s largest natural satellite is Triton, and is believed that it is not originally Neptune’s satellite until Neptune’s gravitational pull grabbed Triton in its orbit.
  • 14. Dwarf Planets
  • 15. Dwarf Planets
    • A dwarf planet is a planet that fails the third requirement of being a planet: Having its own gravity.
    • There are lots of dwarf planets, three of the more known ones are: Pluto, Ceres, and Eris.
    • Pluto used to be an outer planet.
  • 16. Pluto
    • Pluto has 3 natural satellites, Charon, Nix, and Hydra.
    • Scientists using a spectroscope have found that Pluto’s atmosphere contains methane and nitrogen.
    • It is also been found that one of Pluto’s satellites, Charon, shares the same atmosphere with Pluto.
  • 17. Ceres
    • Ceres takes 4.6 years to finish one revolution around the sun.
    • Ceres was once thoght as an asteroid, because it is located in the asteroid belt.
    • Ceres’s surface is covered with things lyk ice, water, carbonates, and clay.
  • 18. Eris
    • Eris was originally named Xena and has a natural satellite named Dysnomia.
    • It takes up to 577 years to complete one revolution!
    • Eris was originally not considered a planet until the category of “Dwarf Planets” came out.