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Discover the fascinating cycle of the Moon's phases as it changes from New Moon to Full Moon and back. Learn why these changes occur and the impact of Earth's orbit. Explore the eight key phases in detail.
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It’s just going through a phase! Source: NASA, Apollo 11
If you look at the Moon each night, you’ll notice its appearance changes.
If you watch closely, you’ll notice the Moon changes in a regular pattern.
It gets larger, and then it gets smaller and then larger again. Why?
The Earth revolves around and the Sun and the Moon revolves around the Earth.
As the Moon revolves around the Earth, different parts of the Moon are in sunlight.
New Moon Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
Waxing The Moon appears to be getting larger.
Waxing Crescent Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
First Quarter Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
Gibbous Between half and full.
Waxing Gibbous Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
Full Moon Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
Waning The Moon appears to be getting smaller.
Waning Gibbous Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
Last/3rd Quarter Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
Waning Crescent Source of Moon Pictures: Goleta Air and Space Museum, http://www.air-and-space.com/Moon20200408.htm
And the cycle begins all over again, month after month after month.