Stars begin the formation process in cold clouds, called molecular clouds; eventually, these clouds collapse internally, generating a solar nebula, which shrinks and generates heat, spins and flattens. Following the chan... More »

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Stars are mostly made up of hydrogen and helium, with only trace amounts of heavier elements. A star is a massive incandescent ball of plasma held together by its own gravity. The principle process that occurs within a s... More »

Perhaps the best known Star Wars concept artist is Ralph McQuarrie, responsible for creating the artwork that guided the look of the first three Star Wars films. Doug Chiang was Art Director for both episodes I and II, w... More »

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Usually several light years across, a nebula is an extremely large cluster of clouds and dust often found between stars. Nebulae are made of many elements including carbon, hydrogen and helium. More »

Stars form when clouds of interstellar dust and gas collapse in on themselves and heat up, eventually leading to the nuclear fusion of hydrogen into helium. Several stars typically form out of a single cloud, making star... More »

According to the University of Leicester, high mass stars are those that have at least three times the mass of the Sun. By contrast, low mass stars have less than half of the mass of the Sun, and intermediate mass stars ... More »

Interstellar bubbles are made when stellar winds caused by massive stars or supernovae push the interstellar gas around them outwards in a bubble shape. Stars clustered close enough together form giant bubbles when their... More »

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