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Chapter 2 6
Studying Space
| Question | Answer |
|---|---|
| refracting telescope | a telescope that uses a set of lenses to gather and focus light from distant sources |
| rotation | the spin of a body on its axis |
| perihelion | the point in the orbit of a planet at which the planet is closest to the sun |
| aphelion | the point in the orbit of a planet at which the planet is farthest from the sun |
| astronomy | the scientific study of the universe |
| reflecting telescope | a telescope that uses a curved mirror to gather and focus light from distant sources |
| electromagnetic spectrum | all of the frequencies or wavelengths of electromagnetic radiation |
| equinox | the movement when the sun appears to cross the celestial equator |
| galaxy | a collection of stars,dust, and gas, bound together by gravity |
| revolution | the motion of a body that travels around another body in space |
| astronomical unit | the average distance between the Earth and the Sun; about 150 km |
| solstice | the point at which the sun is as far north or as far south of the equator as possible |
Created by:
sisteele
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