Term
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Definition
n. The path of an object in space as it moves around another object due to gravity; for example, the Moon moves in an orbit around Earth.
v. To revolve around, or move in an orbit; for example, the Moon orbits Earth. |
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Definition
| The Sun and its family of orbiting planets, moons, and other objects. (p.10) |
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Definition
| Millions or billions of stars held together in a group by their own gravity. (p.10) |
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Term
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Definition
| Space and all the matter and energy in it. (p.10) |
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| A group of stars that form a pattern in the sky. (p.12) |
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Term
electromagnetic radiation |
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Definition
| Energy that travels across distances as certain types of waves. Types of electromagnetic radiation are radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, x-rays, and gamma rays. (p.15) |
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Term
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Definition
1. Radiation from a source separated into a range of wavelengths.
2. The range of colors that appears in a beam of visible light when it passes through a prism. (p.16) |
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Definition
| The distance between one peak and the next peak on a wave. (p.16) |
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Term
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Definition
| A device that gather visible light or another form of electromagnetic radiation. (p.17) |
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Term
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Definition
| An object that orbits a more massive object. (p.23) |
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Definition
| A satellite in which people can live and work for long periods. (p.24) |
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Definition
| A craft designed to land on a planet's surface. (p.28) |
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Definition
| A spacecraft that is sent into a planet's atmosphere or onto a solid surface. (p.29) |
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Term
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Definition
| A round pit left behind on the surface of a planet or other body in space after a smaller object strikes the surface. (p.32) |
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