How much a line slants compared to another line.
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The phase when we see the whole lit side of the moon.
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A massive collection of stars, gas, and dust held together by gravity.
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The force that pulls objects with mass toward each other.
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The phase when the moon is between Earth and the sun, so we see none of its lit side.
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Describes something that is incomplete — only part of the whole.
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The shape of the lit part of the moon that we see from Earth.
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Where an object is compared with a chosen reference point.
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A perfectly round, three-dimensional shape, like a ball.
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A tide with extra-high high tides and extra-low low tides. It happens when the sun, moon, and Earth line up.
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The regular rise and fall of the ocean’s surface, caused mostly by the moon’s pull.
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A slant or lean away from straight up and down.
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An imaginary line through the center of Earth from the North Pole to the South Pole. Earth spins around it.
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Describes a solar eclipse where the Moon appears too small to fully cover the Sun, leaving a bright ring visible around its edge.
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The Sun’s outer atmosphere, visible around the covered disk during a total solar eclipse.
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A thin, curved sliver shape, seen when only a small part of the Moon's lit side faces Earth.
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Happening in a cycle that repeats.
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An event where one object passes into the shadow of another, or blocks the view of another, in space.
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A push or a pull.
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Describes a Moon phase where more than half, but not all, of the visible side is lit.
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The pull that objects with mass have on each other.
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Describes a solar eclipse that appears annular along some parts of its track and total along others.
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When Earth passes between the sun and the moon and Earth’s shadow covers the moon.
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The name of the galaxy that contains our solar system.
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A tide with the smallest difference between high and low water. It happens at the quarter moons.
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The curved path of one object around another in space, maintained by gravity.
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The track across Earth’s surface where the Moon completely covers the Sun’s visible disk during a total solar eclipse.
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The lighter outer part of a shadow, where only some light is blocked.
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A wave bouncing off a surface.
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One full trip of an object around another object.
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Spinning around a center line.
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When the moon passes between the sun and Earth and blocks the sun’s light.
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The stage of a solar eclipse when the Moon completely blocks the Sun's visible surface.
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The darkest, center part of a shadow, where all of the light is blocked.
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Getting smaller. The lit part of the moon we see is shrinking.
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Getting bigger. The lit part of the moon we see is growing.
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