Astronomy and Tides

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Earth

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The third planet from the Sun in our solar system, home to all known life.

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Moon

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The natural satellite of Earth, visible by reflected light from the Sun.

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Phases

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The different appearances of the Moon as seen from Earth, caused by the relative positions of the Earth, Moon, and Sun.

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Reflection

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The process by which light bounces off a surface, such as the Moon reflecting sunlight.

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New moon

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The phase of the Moon when it is in conjunction with the Sun and invisible from Earth.

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First quarter

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The phase of the Moon when half of it is illuminated and visible from Earth, occurring about a week after the new moon.

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Full moon

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The phase of the Moon when it is fully illuminated as seen from Earth, occurring when the Earth is between the Sun and the Moon.

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Last quarter

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The phase of the Moon when half of it is illuminated and visible from Earth, occurring about a week after the full moon.

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Eclipse

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An event where one celestial body moves into the shadow of another celestial body, such as a solar or lunar eclipse.

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Tide cycle

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The regular rise and fall of sea levels caused by the gravitational forces of the Moon and the Sun acting on the Earth.