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PLANET FACTS

PLANET FACTS. MERCURY . Length of Day = 58.65 Earth Days Length of Year = 87.97 Earth Days Mean Surface Temp = 342 degrees F Surface: Dusty layer of minerals, surface is plains, cliffs, and craters Atmosphere = trace amts of H and He. MERCURY.

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PLANET FACTS

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  1. PLANET FACTS

  2. MERCURY • Length of Day = 58.65 Earth Days • Length of Year = 87.97 Earth Days • Mean Surface Temp = 342 degrees F • Surface: Dusty layer of minerals, surface is plains, cliffs, and craters • Atmosphere = trace amts of H and He

  3. MERCURY • 2/5ths the size of Earth (second smallest in the Solar System) • Diameter: 3032.4 miles • Mean distance from sun = 35 million miles • Moons: 0 • Rings: 0

  4. VENUS • Length of Day = 243 Earth Days • Length of Year = 225 Earth Days • Mean Surface Temp = 225.5 degrees F • Surface = rocky, dusty, waterless expanse of mountains, canyons, and plains, with a 200-mile dried-up river bed. • Atmosphere = 95% carbon dioxide, N, sulfuric acid, traces

  5. VENUS • About 650 miles smaller in diameter than Earth • Diameter: 7519 miles • Mean distance to sun: 67.24 million miles • Moon: 0 • Rings: 0

  6. EARTH • Length of Day = 1 Earth Day • Length of Year = 1 Earth Year • Mean Surface Temp = 60 degrees F • Surface: Earth is made up of water (70%), air, and solid ground. It appears to be the only planet with water. • Atmosphere: N, O, and others

  7. EARTH • Four planets in our solar system are larger and four are smaller than Earth • Diameter: 7926 miles • Mean distance from sun: 92.9 million miles • Moons: 1 • Rings: 0

  8. MARS • Length of Day: 24 Earth hrs, 37 minutes, 23 seconds • Length of Year: 687 Earth days • Mean Surface Temp = -76 degrees F • Surface: Canyons, dunes, volcanoes, and polar caps of water ice and carbon dioxide ice • Atmosphere: 95% carbon dioxide

  9. MARS • About 1/2 the size of Earth • Diameter: 4194 miles • Mean distance from sun: 141.71 million miles • Moons: 2 • Rings: 0

  10. JUPITER • Length of Day: 9 Earth hours, 55 minutes • Length of Year: 12 Earth years • Mean Surface Temp = -234 degrees F • Surface: A hot ball of gas and liquid • Atmosphere: Whirling clouds of colored dust, H, He, methane, water, and ammonia. The Great Red Spot is an intense windstorm larger than Earth.

  11. JUPITER • 11 times the diameter of Earth - largest planet in Solar System • Diameter: 88736 miles • Mean distance from sun: 483.88 million miles • Moons: 16 • Rings: 1

  12. SATURN • Length of Day: 10 Earth hrs, 40 minutes, 24 seconds • Length of Year: 29.5 Earth years • Mean Surface Temp = -288 degrees F • Surface: Liquid and gas • Atmosphere: H and He

  13. SATURN • About 10 times larger than Earth • Diameter: 74978 miles • Mean distance from sun: 887.14 million miles • Moons: 19 • Rings: ~ 1000??

  14. URANUS • Length of Day: 17 Earth hours • Length of Year: 84 Earth years • Mean Surface Temp = -353 degrees F • Surface: Little is known • Atmosphere: H, He, and methane

  15. URANUS • 4 times larger than Earth • Diameter: 32193 miles • Mean distance from sun: 1783.98 million miles • Moons: 17 • Rings: 11

  16. NEPTUNE • Length of Day: 16 Earth hours, 7 minutes • Length of Year: 165 Earth years • Mean Surface Temp = -353 degrees F • Surface: Liquid layer covered with thick clouds; constant raging storms • Atmosphere: H, He, methane, and ammonia

  17. NEPTUNE • About 4 times the size of Earth • Diameter: 30775 miles • Mean distance from sun: 2680 million miles • Moons: 8 • Rings: 4

  18. PLUTO • Length of Day: 6 Earth days, 9 hours, and 18 minutes • Length of Year: 248 Earth years • Mean Surface Temp = -378 degrees F • Surface: A giant snowball of methane and water mixed with rock • Atmosphere: Methane

  19. PLUTO • Less than 1/5 the size of Earth • Diameter: 1423 miles • Mean distance from sun: 3666 million miles • Moons: 1 • Rings: 2

  20. ASTEROID BELT • Several hundred thousand asteroids have been discovered and given provisional designations so far. Thousands more are discovered each year. There are undoubtedly hundreds of thousands more that are too small to be seen from the Earth. There are 26 known asteroids larger than 200 km in diameter. Our census of the largest ones is now fairly complete: we probably know 99% of the asteroids larger than 100 km in diameter. Of those in the 10 to 100 km range we have cataloged about half. But we know very few of the smaller ones; there are probably considerably more than a million asteroids in the 1 km range. • Main Belt: located between Mars and Jupiter roughly 2 - 4 AU from the Sun; further divided into subgroups: Hungarias, Floras, Phocaea, Koronis, Eos, Themis, Cybeles and Hildas (which are named after the main asteroid in the group).

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