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30.3-30.4 Phases of the Moon & Other Satellites

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Katelynn Dorn

on 7 May 2015

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Transcript of 30.3-30.4 Phases of the Moon & Other Satellites

Calendar Struggles
Phases of the Moon
The Calendar
day- Earth rotating on its axis
month- moon completes one cycle of phases
solar year- earth orbits sun
Moons of Mars
17 mi across
7 hr 40 min orbit
9 mi across
30 hr orbit
Rings and Moons of Saturn
rings composed of chunks of ice, dust and large rock
67,000 km wide and 200 m thic
18 moons- Titan
Satellites of Uranus, Neptune, and Pluto
Uranus- at least 20 small moons
Oberon, Titania, Umbriel, and Ariel
11 small rings
Neptune- 8 known moons, thin set of rings
Triton- icy, retrograde orbit
Charon completes orbit in 6.4 days, as long as one day on Pluto
Rings and Moons of Jupiter
17 moons- 4 are very large (Galilean)
Io- closest, size of Earth's moon, volcanic, molten iron core, sulfuric gases give it color
Europa- size of Earth, less dense, rock core w/ crust of ice
Ganymede- largest, ice and rock, strong magnetic field
Callisto- similar to Ganymede but rougher surface
30.3-30.4 Phases of the Moon & Other Satellites
The Earth does not make a complete number of full rotations around the sun
the earth does not make a whole # of rotations in the time the moon orbits it
the moon doesn't make a whole # of orbits around the earth in time for Earth to finish orbiting the sun
First Calendar (Romulus, 738 BC)
304 days, 10 months
Julian Calendar
12 months of 30-31 days
every 4th year a leap year w/ extra day
Gregorian Calendar (Pope Gregory XIII, 1580)
three fewer days every 400 years
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