What’s wrong with the white line of NGC6992

![image|35x500](上传://qiVz8gNoW4QfQkrt584xL8VCClA.jpeg)

Wow, check out that region (Cygnus Loop) in the GALEX layer!
https://www.legacysurvey.org/viewer/?ra=312.7753&dec=30.8982&layer=galex&zoom=8&ngc

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