Section 2: Movements of the Moon. Preview Key Ideas The Earth-Moon System Eclipses Phases of the Moon Lunar Phases Tides on Earth. Key Ideas. Describe the shape of the moon’s orbit around Earth. Explain why eclipses occur. Describe the appearance of four phases of the moon.
The Moon’s Elliptical Orbit
Moonrise and Moonset
Why are we unable to photograph the far side of the moon from Earth?
The far side of the moon is never visible from Earth, because the moon’s rotation and the moon’s revolution around Earth takes the same amount of time.
Effects of Solar Eclipses
What is one difference between a total solar eclipse and an annular eclipse?
During a total eclipse, the entire disk of the sun is blocked, and the outer layers of the sun become visible. During an annular eclipse, the disk of the sun is never completely blocked out, so the sun is too bright for observers on earth to see the outer layers of the sun’s atmosphere.
Frequency of Solar and Lunar Eclipses
Waxing Phases of the Moon
Waning Phases of the Moon
Time from New Moon to New Moon
Describe two phases of the waning moon.
When the lighted part of the moon is larger than a semicircle but the visible part of the moon is shrinking, the phase is called waning gibbous. When only a sliver of the near side is visible, the phase is a waning crescent.
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