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Moon Phases 1. Shadows Self Shadow – the shadow on an object Projected Shadow – the shadow of the object What type of shadow are we seeing on the moon?

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Presentation on theme: "Moon Phases 1. Shadows Self Shadow – the shadow on an object Projected Shadow – the shadow of the object What type of shadow are we seeing on the moon?"— Presentation transcript:

1 Moon Phases 1

2 Shadows Self Shadow – the shadow on an object Projected Shadow – the shadow of the object What type of shadow are we seeing on the moon? 2

3 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 3

4 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 4

5 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 5

6 http://www.niehs.nih.gov/kids/ lunar/why_phases.gif 6

7 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 7

8 New Moon The lighted side of the Moon faces away from the Earth. This means that the Sun, Earth, and Moon are almost in a straight line, with the Moon in between the Sun and the Earth. The Moon that we see looks very dark 8

9 New Moon 9

10 First Quarter Moon The right half of the Moon appears lighted and the left side of the Moon appears dark. During the time between the New Moon and the First Quarter Moon, the part of the Moon that appears lighted gets larger and larger every day, and will continue to grow until the Full Moon. 10

11 First Quarter Moon 11

12 Full Moon The lighted side of the Moon faces the Earth. This means that the Earth, Sun, and Moon are nearly in a straight line, with the Earth in the middle. The Moon that we see is very bright from the sunlight reflecting off it. How much of the Moon are we really seeing? 12

13 Full Moon 13

14 Third (Last) Quarter Moon Sometimes called Third Quarter. The left half of the Moon appears lighted, and the right side of the Moon appears dark. During the time between the Full Moon and the Last Quarter Moon, the part of the Moon that appears lighted gets smaller and smaller every day. It will continue to shrink until the New Moon, when the cycle starts all over again. 14

15 Third Quarter Moon 15

16 There are also four other phases of the Moon sometimes used. 16

17 Waxing Crescent Moon This Moon can be seen after the New Moon, but before the First Quarter Moon. The crescent will grow larger and larger every day, until the Moon looks like the First Quarter Moon. ("Waxing" means increasing, or growing larger.) http://btc.montana.edu/ceres/html/birthdayphases.html 17

18 Waxing Crescent Moon http://btc.montana.edu/ceres/html/birthdayphases.html 18

19 Waxing Gibbous Moon This Moon can be seen after the First Quarter Moon, but before the Full Moon. The amount of the Moon that we can see will grow larger and larger every day. ("Waxing" means increasing, or growing larger.) http://btc.montana.edu/ceres/html/birthdayphases.html 19

20 Waxing Gibbous Moon http://btc.montana.edu/ceres/html/birthdayphases.html 20

21 Waning Gibbous Moon This Moon can be seen after the Full Moon, but before the Last Quarter Moon. The amount of the Moon that we can see will grow smaller and smaller every day. ("Waning" means decreasing, or growing smaller.) http://btc.montana.edu/ceres/html/birthdayphases.html 21

22 Waning Gibbous Moon http://btc.montana.edu/ceres/html/birthdayphases.html 22

23 Waning Crescent Moon This Moon can be seen after the Last Quarter Moon and before the New Moon. The crescent will grow smaller and smaller every day, until the Moon looks like the New Moon. ("Waning" means decreasing, or growing smaller.) http://btc.montana.edu/ceres/html/birthdayphases.html 23

24 Waning Crescent Moon http://btc.montana.edu/ceres/html/birthdayphases.html 24

25 http://www.opencourse.info/astronomy/introduction/04.motion_moon/moon_phases.gif 25

26 Waxing & Waning http://www.nasm.si.edu/apollo30th/moontheater/phasepage4.html 26

27 http://www.nasm.si.edu/apollo30th/moontheater/phasepage4.html 27

28 http://www.calvin.edu/~lmolnar/moon/images/phases.gif 28

29 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.Antonio Cidadao http://aa.usno.navy.mil/faq/docs/mo on_phases.html 29

30 MOON QUIZ!! http://starchild.gsfc.nasa.gov/docs/StarChi ld/solar_system_level2/moonlight.html 30

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