Astronomy Special Project by Alice Owen and Declan Rexer
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Alice Owen and Declan Rexer, The Veil Nebula
The above photo was composed from 20 exposures of two minutes each in each of two narrow-band filters, and 20 exposures of 10 seconds each in a broadband filter.
The narrow-band image for hydrogen gas is mapped to red, and that for oxygen is mapped to teal. The broadband image is mapped to white.