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The point that is farthest from the sun in the orbit of a planet or
comet. |
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| A small, rocky body that can range in size from 100km to less than 1km. |
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| The center of mass or the balancing point between two objects. |
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| The theory that proposes that the universe originated as a single mass, which subsequently exploded and has been expanding ever since |
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| A small body made of rocky and metallic pieces held together by frozen gases, they move around the sun in elongated orbits. |
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| The apparent change in frequency of electromagnetic or sound waves caused by the relative motions of the source and the observer. |
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| The time during which the Earth is in its spring and fall and is closest to the sun. |
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| A system of multiple stars and the objects that orbit them. |
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| An imaginary line in the Pacific Ocean that marks the change of the calendar day. |
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| When the Earth moves directly in line between the Sun and the moon. |
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| The luminous phenomenon observed when an object enters Earth’s atmosphere and burns up |
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| A mass of stone or metal that has fallen from space and has reached Earth’s surface. |
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| The idea that the solar system formed as a spinning cloud of dust and gases. |
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| The periodic oscillation of the precessional axis of the Earth. This can change the angle of the Earth’s axis by half a degree. |
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| The point in the orbit of a planet where it is closest to the sun |
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| he complex motion of a rotating body that resembles the spinning of a top. This type of motion is demonstrated by the Earth’s 23. Degree angle of its axis. |
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| Huge cloudlike structures consisting of chromospheric gases. These often appear as arches that extend out into the atmosphere of the sun. |
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| The motion of one body around another, as Earth goes around the Sun. |
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| When the Earth makes one full rotation around its axis. This causes night and day. |
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| When the moon moves directly in line between the Earth and the Sun. |
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| A sudden and tremendous eruption in the solar chromosphere. This release a lot and many different types of electromagnetic waves. |
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| Consists of one or more stars and the planets and other bodies that orbit them. |
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| Either of two times a year when the sun is furthest from the equator, occurs in winter and summer |
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| Any heavenly body that appears as a fixed point at night. Usually there is only one or two per solar system |
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Definition
| A dark spot on the sun, which is cool by contrast to the surrounding photosphere |
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| All matter and space in existence, including the Earth and the heavens. |
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