all of the astronomy text
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| astronomy | the study of universe
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| astr- | star, heavens, outerspace
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| light-year | the distance that light travels in one year; about 9.46 trillion kilometers
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| spectrum | the band of colors produced when light passes through a prism
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| apparent magnitude | the brightness of a star as seen from the Earth
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| absolute magnitude | the brightness that a star would have at a distance of 32.6 light-years from Earth
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| ab- | from, away
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| parallax | an apparent shift in the position of an object when viewed from different locations
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| Red Giant | a large, reddish star late in its life cycle
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| White Dwarf | a small, hot, dim star this is the left-over center of an old star
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| H-R Diagram | Hertzsprung-Russell diagram, a graph that shows the relationship between a star’s surface temperature and absolute magnitude
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| Supernova | a gigantic explosion in which a missive start collapses and throws its outer layers into space
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| super- | greater than normal, excessive
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| Black Hole | an object so massive and dense that even light cannot escape its gravity
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| Galaxy | a collection of stars, dust, and gas bound together by gravity
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| Nebula | a large cloud of gas and dust in interstellar space; a region in space where stars are born or where stars explode at the end of the lives
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| Cosmology | the study of the origin, properties, processes, and evolution of the universe
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| Rotation | the spin of a body in its axis
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| Orbit | the path that a body follows as it travels around another body in space
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| Revolution | the motion of a body that travels around another body in pace; one complete trip along an orbit
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| Phase | the change in the sunlit area of one celestial body as seen from another celestial body
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| Eclipse | an event in which the shadow of one celestial body falls on another
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| Comet | a small body of ice, rock, and cosmic dust that follows an elliptical orbit around the sun and that gives off gas and dust in the forms of a tail as it passes close to the sun
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| Asteroid | a small, rocky object that orbits the sun, usually in a band between the orbits of Mars and Jupiter
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| Asteroid Belt | the region of the solar system that is between the orbits of Mars and Jupiter and in which most asteroids orbit
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| Meteoroid | a relatively small, rocky body that travels through space
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| Meteorite | a meteoroid that reaches the Earth’s surface without burning up completely
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| Meteor | a bright streak of light that results when a meteoroid burns in the Earth’s atmosphere
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