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Moon Guide
Question | Answer |
---|---|
Diameter | 3476 km (1/4 of Earth's) |
Gravity | 1/6 of Earth's |
Escape Velocity | 2.38 km/s (1/5 of Earth's) |
Orbital Inclination | 5.2 degrees |
Apogee | Farthest away |
Perigee | Closest |
Sidereal Period | (Compared to stars) 27.3 days |
Synodic Period | (Compared to sun) 29.5 days |
Surface Temperature | 100-400 Kelvin |
Axial Tilt | 6.7 degrees |
Moon's Front | lunar highlands & maria; crust averages 60 km thick |
Moon's Back | lunar highlands & craters; crust averages 100 km thick |
Internal Structure | Crust (60-100 km); mantle (800 km thick); core (made of iron) |
Lunar Maria | 17% of the moon's surface; smooth plains with huge circular basins, basalts, and lava flows |
Mascons | Areas of mass concentration of gravity |
Rilles | Deep cracks running through Maria; caved in lava tunnels, found near edges of Maria; largest: Hadley Rille (located in the mare embrium "sea of rains" |
Lunar Highlands | Mountainous regions on surface; light in color; form around the edge of the Maria; can be 5k in height; form from impact craters; oldest feats on the lunar surface; "lunar Alps" |
Craters | Hollowed out bowl-shaped depressions; range in size; largest: Clavius (240k in diameter; named after scholars & scientists) |
Rays | Bright streaks of shattered rocks and dust, can cover thousands of kilometers in length, can overlap any of the other lunar feats |
Soil | Regolith; gardening: the stirring of regolith |