Orion Nebulae: This image features the Cassiopeia A supernova, an expanding ball of matter and energy ejected from an exploding star. Horsehead Nebulae: The Horsehead Nebula is famously known for ...
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What Is a Nebula?On the other end of the spectrum, there are nebulae that barely shine at all. Dark nebulae are cool, dense clouds of matter ...
Ring Nebula: Messier 57, more commonly known as the Ring Nebula, is about 2,000 light-years away in the constellation Lyra, and is best observed during August. It was discovered by French ...
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