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Gravity

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a force of attraction between objects due to their masses.

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Season

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determined by both Earth’s tilt relative to the Sun and Earth’s position in its orbit

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Revolution

Back

the motion of one object around another object

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Rotation

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the turning of an object on its axis

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Satellite

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a natural or artificial body that revolves around a planet

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Equinox

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the moment when the Sun is directly above the equator: day and night lengths are equal

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Prominence

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a loop of relatively cool, incandescent gas that extends above the photosphere of the Sun and above the Sun’s edge as seen from Earth

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Solar flare

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an explosive release of energy that comes from the Sun and that is associated with magnetic disturbances on the Sun’s surface

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Solstice

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the point at which the Sun is as far north or as far South of the equator as possible: shortest and longest days of the year

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Sunspot

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a dark area on the photosphere of the Sun that is cooler than the surrounding areas and that has a strong magnetic field