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Because they're huge blobs of helium and gas that are burning, like a huge fire. Just like our sun. Our sun is just another star, but much closer.
http://wiki.answers.com/Q/What_make_stars_shine
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Question: How bright do stars shine? janette l gubala Answer: The brightness of stars as seen from the Earth is called "apparent visual magnitude"; it is designinated by "m subscript v" and is a logarithmic scale like the Richter scale used for earthquakes.
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www.newton.dep.anl.gov/askasci/ast99/ast99285.htm
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The process that causes stars to shine is the same one that we have harnessed for use as a weapon: nuclear fusion. Stars start as huge regions of gas, mostly hydrogen. This gas will start to contract, and it heats up. As it contracts, its t...
http://www.pa.msu.edu/sciencet/ask_st/060392.html
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Planet Earth, our bodies, and shining stars are all made of the same basic elements of matter. To understand why stars shine, we must first understand the tiny particles that make up matter. Scientists have studied matter in their laboratories for many, many years.
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starchild.gsfc.nasa.gov/docs/StarChild/questions/questi...
starchild.gsfc.nasa.gov/docs/StarChild/questions/question13.html
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Stars are giant balls of glowing gas. Stars shine because the gas inside them is so hot that a process called "nuclear fusion" takes place. Nuclear fusion is where 2 atoms come together (or "fuse") to form a different kind of atom;
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imagine.gsfc.nasa.gov/docs/ask_astro/answers/970304.htm...
imagine.gsfc.nasa.gov/docs/ask_astro/answers/970304.html
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The stars are gaseous, and hot gases try to expand. At the same time the enormous gravitational pull of the inner material on any layer of gas is trying to pull the gas in itself. For the star to be stable these two forces must be in equilibrium.
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www.raja-suvendra.net/Suvendra/node14.htm
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They also did followup observations with the Hubble Space Telescope, looking for any evidence of stars. ... The discovery of red giant stars in the region would give some indication that this was a more normal interaction. But Hubble turned up nothing. ... One Response to “No Stars Shine in This Dark Galaxy”...
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www.universetoday.com/2007/06/14/no-stars-shine-in-this...
www.universetoday.com/2007/06/14/no-stars-shine-in-this-dark-galaxy/
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10 Things You May Have Missed On TV This Week #mixedbag #tyrafaketoenails ... Is It Time To Stop Listing "Best" Books? #litlists #booklists ... K Is For Kate, Who Kicks Ass, Takes Names #thenamegame #namegame...
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jezebel.com/353684/madonna-makes-the-stars-shine-for-ma...
jezebel.com/353684/madonna-makes-the-stars-shine-for-malawi
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