Moons

Moons

1. Earth's Moon

   • Diameter is 3,474 km
   • Atmosphere is one-sixth of Earth's.
   • Rotation takes equal time as orbit
     • Therefore, during it's orbit the same side always faces the Earth
   • Earth's Moon has no moons or rings
   • It is moving away from the Earth 1 inch per year
   • Is covered in dust and rocks called lunar regolith.

2. Europa

   • Orbits Jupiter every 3.5 Earth days.
   • Has surface of cracked water ice.
   • 40-90 million years old.
   • Discovered by Galileo Galilei.
     • On January 8, 1610.
   • Disrupts Jupiter's magnetic field
   • Diameter is 3,100 km.

3. Enceladus

   • Spews water vapor and ice particles.
   • Saturn's 6th largest moon
   • Diameter is 504 km
   • Reflects almost 100% of light that hits it.
   • At least 5 different types of terrain
   • Discovered by William Herschel.
     • On August 28 1789.

4. Titan

   • Diameter is 5,152 km
   • Is the only moon in our solar system with a thick atmosphere.
     • Mostly nitrogen, some methane.
   • Is larger than Mercury
   • Discovered by Christiaan Huigens.
     • On March 25 1655
   • Has liquid ethane and methane flowing cross it's surface.
   • Has different regions.

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