The Red Spider Nebula

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Centred on a dying star, The Red Spider Nebula expels scorching stellar winds at 300 kilometres per second, generating waves 100 billion kilometres high. 

These supersonic shock waves, caused by the heating of compressed gas and expansion of the nebula, collide with atoms and cause them to radiate light. The Red Spider Nebula resides in the constellation of Sagittarius, about 3-4000 light-years away.

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