Moon Moon Phases The Moon https www youtu

Moon & Moon Phases

The Moon https: //www. youtu be. com/watch? v=2 i SZMv 64 wu. U

Moon Facts • The earth’s only natural satellite • The moon is 2, 160 miles in diameter, slightly more than 1/4 the diameter of Earth • Gravity 1/6 of the earth • No meaningful atmosphere, just trace amounts of hydrogen, helium, neon and argon.

Moon’s orbit • The orbit period around the earth – 27. 3 days • The spin period is exactly the same! – This is why we always see the same side of the moon!

Near Side Far Side https: //www. youtube. com/watch? v=k. Jk. Veg. Bs. Ny. E

The formation of the moon • Giant impact hypothesis – An impact of a Mars-sized body collide w/ the proto. Earth and ejected materials to orbit around the earth – the Moon https: //www. youtube. com/watch? v=WGTBJHFNyw. I

Maria – Moon’s Surface Highland Maria (singular mare, ‘sea’ in Latin) Maria – Dark areas and were thought to be seas – Cover 31% of the near side, but only 2% of the far side Crater – No water but vast pools of solidified lava that flowed into basins formed by comets/meteors colliding

Highland Maria – Moon’s Surface • Highland – Lighter color regions, or called Terrae Maria – Different brightness of the highlands and maria is because they are composed of different rock types Crater

Craters • Formed when asteroids/comets hit the lunar surface • Half a million craters with diameters larger than 1 km • Crater counting – to estimate the age of the lunar surface

Moon Phases • Why does the moon change phases? • Lunar phases are the result of our eyes seeing the illuminated half of the Moon from different viewing angles. • Due to the Moon’s orbital positions

The Moon’s Orbit around the earth

Phases of the Moon • https: //www. youtube. com/watch? v=n. Xse. T WTZlks

Complete this Say, Sun rises at 6 am and sets at 6 pm Moon Phase Moon Rise Time New Moon Sunrise/6 am Waxing Crescent 9 am First Quarter 12 pm Waxing Gibbous 3 pm Full Moon 6 pm Waning Gibbous 9 pm Third Quarter 12 am Waning Crescent 3 am