Group 9 Phases Of The Moon

The lunar phase is an astronomical term referring to the portion of the Moon that is visibly illuminated by the Sun, as seen from Earth.As the Moon orbits the Earth, the relative positions of the Sun, Earth and Moon change. Since the Moon only appears bright due to the Sun's reflected light, only the half of the Moon closest to the Sun is illuminated.

Lunar phases are the result of our seeing the illuminated half of the Moon at different angles. The Moon exhibits different phases as the relative positions of the Sun, Earth and Moon change, appearing as the full moon when the Sun and Moon are on opposite sides of the Earth, and becoming invisible as the new moon when they are on the same side. The time between two full moons is 29.5 days; it is longer than the time it takes the Moon to orbit the Earth since the Earth-Moon system is orbiting the Sun.

The phases are not created by the shadow of the Earth on the moon; instead, they are a result of our seeing only part of the illuminated half of the Moon.

.New**Moon - Not visible

.Wax**ing crescent Moon - Right 1-49% visible

.First quarter Moon - Right 50% visible

.Waxing gibbous Moon - Right 51-99% visible

.Full Moon - Fully visible

.Waning gibbous Moon - Left 51-99% visible

.Third quarter Moon - Left 50% visible

.Waning crescent Moon - Left 1-49% visible

.NewMoon - Not visible moon-phases-diagram1.jpg

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