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Chapter 19
Exploring Space
| Term | Definition |
|---|---|
| Constellation | a group of stars that form a pattern in the sky |
| Electromagnetic radiation | energy that travels across distances as certain types of waves |
| Galaxy | millions or billions of stars held together in a group by their own gravity |
| Impact crater | a round pit left behind on the surface of a planet or other body in space after a smaller object strikes the surface |
| Lander | a craft designed to land on a planet's surface |
| Light-year | the distance light travels in one year, which is about 9.5 trillion kilometers (6 trillion miles) |
| Orbit | the path of an object in space as it moves around another object due to gravity |
| Probe | a spacecraft that is sent into a plane'ts atmosphere or onto a solid surface |
| Satellite | an object that orbits a more massive object |
| Solar system | the Sun and its family of orbiting planets, moons, and other objects |
| Space station | a satellite in which people can live and work for long periods |
| Spectrum | radiation from a source separated into a range of wavelengths |
| Telescope | a device that gathers visible light or another form of electromagnetic radiation |
| Universe | space and all the matter and energy in it |
| Wavelength | the distance between one peak and the next peak on a wave |
Created by:
avaught
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