Moon Phases A look at the movements of the Moon
Movements of the Moon • Revolution – Moon orbits the Earth every 271/3 days • The moon rises in the east and sets in the west • The moon rises and sets 50 minutes later each day • Rotation – Moon turns on its axis every 27 days • Same side of Moon always faces Earth
It’s Just a Phase• Moonlight is reflected sunlight• Half the moon’s surface is always reflecting light• From Earth we see different amounts of the Moon’s lit surface• The amount seen is called a “phase”
Limb The line where the surface of the moon meets the sky.TerminatorThe imaginary line between he reflected light and hadow.
Waxing and Waning• New moon l s ( hir qua t r a t t d) r e wa Moon ning• Waxing Crescent moon m orb `s oon it erh at• First Quarter moon SUN cr s nt e ce gibb sm ou oon• Waxing Gibbous moon e rt a h• Full moon fl m u l oon• Waning Gibbous moon ne m w oon• Third Quarter moon• Waning Crescent moon cr s nt e ce gib ousm b oon• New moon w x Moon a ing f s qu r e ir t a t r
Orbits (revolves around) Earth every 27.3 days Elliptical orbit (not a perfect circle)• About 384,000 km (240,000 miles) from Earth 360,000 km 406,000 km 10 224,000 miles 252,000 miles
Moon rise times: The New Moon always rises at sunrise. The first quarter Moon rises at noon. The Full Moon rises at sunset. The last quarter Moon rises at midnight. Moonrise takes place about 50 minutes later each day than the day before.
Name this phase! Full MoonWhat time does this phase rise and set?
Is this line the limb orterminator? Limb TerminatorIs this line the limbor terminator?