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astr101_04_MoonPhases.pdf - Astronomy 101 Moon Phases and...

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Astronomy 101Moon Phases and Eclipses
How are the motions and positions ofEarth and the Sun connected to whathappens on Earth?
3How long does it take to complete thefull cycle of Moon Phases?
The changing phases of the moon initiallyinspired the concept of the month4
Moon Phase NamesNew MoonWaxing CrescentFirst QuarterWaxing GibbousFull MoonWaning GibbousThird QuarterWaning Crescent(Repeat)
Moon PhasesFirstquarterFullMoonThirdquarterNewMoon
Although theMoon is always½ lit by theSun, we seedifferentamounts of thelit portion fromEarthdepending onwhere theMoon islocated in itsorbit.
DEMO: Phases of the Moon
Phases of the Moon: 29.5-day cyclenewcrescentfirst quartergibbousfullgibbouslast quartercrescentwaxing = growing• Moon visible in afternoon/evening• Gets “fuller” and rises later each daywaning = shrinking• Moon visible in late night/morning• Gets “less” and sets later each day}}
Moon Phases SimulationPay attention to where the Moon, Sun and Earthare located and how the Moon appears from Earthat each of these positions.Look at how much of the Moon is illuminatedwhen at each position.Look at which side of the Moon is illuminatedwhen at each position.10
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Term
Winter
Professor
bennert
Tags
New Moon, crescent Moon

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