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ch 26 science vocab

science ch 26 sec 1/ freshman com/ Tyler Fisher

astronomy the scientific study of the universe
galaxy a collection of stars, dust, and gas bound together by gravity
astronomical unit the average distance between the Earth and the sun; approximately 150 kilometers
electromagnetic spectrum all of the frequencies or wavelengths of electromagnetic radiation
telescope an instrument that collects electromagnetic radiation from the sky and concentrates it for better observation
refracting telescope a telescope that uses a set of lenses to gather and focus light from distant objects
reflecting telescope a telescope that uses a curved mirror to gather and focus light from distant objects
Created by: 100001970150319