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When we look up on a dark night, we see a sky filled with stars. The light from a star, like the light from a flashlight or a lightning bug, is one form of electromagnetic radiation. Light is formed of waves, and different colors of light have different wavelengths. Articles about ASTRONOMY: http://www.scoop.it/t/science-news?tag=astronomy 
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Astronomers using NASA’s Chandra X-ray Observatory have reported record-breaking wind speeds coming from a stellar-mass black hole.
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X-ray observations of supernova Cassiopeia A by the orbiting Chandra X-ray Observatory show that some of the innermost elements are now located near the outer edges of the remnant; proof of the explosion's power
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