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Planets PowerPoint Presentation

Planets

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Planets

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  1. Planets

  2. Inner (Terrestrial) Small Rocky Closer to sun (faster orbits) Thin atmospheres Outer (Jovian) Very large Thick atmosphere (H, He, methane) Distant from sun (longer orbits) Rings Types of Planets Photos from: http://photojournal.jpl.nasa.gov/index.html

  3. Mercury • 88 day revolution • 59 day rotation • Very small • Weak mag. Field. • Day: 400 °C; Night: -200 °C • Little to no atmosphere • No moons

  4. Venus • 225 day revolution • 243 day rotation (1 day is longer than 1 year) • Dense Atmosphere (CO2, Sulfuric acid) • Intense greenhouse effect • 475 °C day temp (hottest planet) • No moons

  5. Earth • 365 day year • 24 hr. day • Temp allows for s, l, g water • 1 moon

  6. Mars • 687 day revolution • ~24 hr day • Tilt is similar to Earth’s = 4 seasons • Weak or no magnetic field • Day: 27 °C; night: -127 °C • Mt. Olympus – largest volcano in Solar System , 26 km tall, extinct • 2 moons

  7. Meteorites/Asteroid • Small rocky objects • Commonly found between Mars and Jupiter • 10’s of thousands are known • Most are the size of pebbles and are spaced far apart • ~220 are > 100 km across • Up to 1,000,000 are expected to be in orbits that may cross Earth’s 17 km Gaspra Ida 52 km

  8. Known positions of asteroids in the inner Solar system

  9. Jupiter • Largest planet • 11.9 year revolution • ~10 hr. rotation • Strong magnetic field – solid or liquid ‘core’ • Radiates more heat to space than it receives. • Great Red Spot – severe storm system • 62 (!) moons

  10. Saturn • 30 year revolution • ~10 hr. rotation • Lowest density of all planets • Less than 1.0 g/cm3  would float in water • Weaker magnetic field than Jupiter • Spectacular Ring System • 33 (!) moons

  11. Uranus • 84 year revolution • 17.2 hr. rotation • -200 °C surface temperature • Tilted on side, magnetic field is not • 27 moons

  12. Neptune • 165 year revolution • 16.1 hr. rotation • -225 °C surface temp. • Methane gives blue color • Also tilted on side • Sometimes 9th planet (if Pluto’s orbit comes inside Neptune’s) • 13 moons

  13. Pluto • 9th (or 8th) planet • 248 year revolution • 6.3 day rotation • Smallest – only 2800 km diameter • Smaller than Earth’s moon • -235 to -210 °C temperature • Frozen atmosphere • 1 moon