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Chapter 19

Exploring Space

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