Moon Phases.

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Moon Phases. Half of the Moon is always lit up by the sun. As the Moon orbits the Earth, we see different parts of the lighted area.

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Presentation transcript:

Moon Phases

Half of the Moon is always lit up by the sun Half of the Moon is always lit up by the sun. As the Moon orbits the Earth, we see different parts of the lighted area. http://www.nasm.si.edu/apollo30th/moontheater/phasepage2.html

The revolution of the Moon around the Earth makes the Moon look as if it is changing shape in the sky. http://btc.montana.edu/ceres/html/birthdayphases.htm

This is caused by the different angles from which we see the lighted part of the Moon's surface. These are called "phases" of the Moon. http://btc.montana.edu/ceres/html/birthdayphases.htm

http://www.niehs.nih.gov/kids/lunar/why_phases.gif

The Moon passes through four major shapes during a cycle that repeats itself every 29.5 days. The phases always follow one another in the same order: New moon First quarter Third quarter Full moon

New Moon

First Quarter Moon

Third Quarter Moon

Full Moon

There are also four other phases of the Moon sometimes used.

("Waxing" means increasing, or growing larger.) http://btc.montana.edu/ceres/html/birthdayphases.html

Waxing Crescent Moon http://btc.montana.edu/ceres/html/birthdayphases.html

Waxing Gibbous Moon http://btc.montana.edu/ceres/html/birthdayphases.html

"Waning" means decreasing, or growing smaller. http://btc.montana.edu/ceres/html/birthdayphases.html

Waning Gibbous Moon http://btc.montana.edu/ceres/html/birthdayphases.html

Waning Crescent Moon http://btc.montana.edu/ceres/html/birthdayphases.html

http://www. opencourse. info/astronomy/introduction/04 http://www.opencourse.info/astronomy/introduction/04.motion_moon/moon_phases.gif

Waxing & Waning http://www.nasm.si.edu/apollo30th/moontheater/phasepage4.html

http://www.nasm.si.edu/apollo30th/moontheater/phasepage4.html

http://www.calvin.edu/~lmolnar/moon/images/phases.gif

Moon Movie The movie is an animated GIF created by Antonio Cidadao from a sequence of still images taken during March and April 1998. Copyright Antonio Cidadao. http://aa.usno.navy.mil/faq/docs/moon_phases.html

MOON QUIZ!! http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level2/moonlight.html