They edit the colors, several gases show up as red and they go back and artificially recolor certain gases to come to the pictures you see above.
#6
Hylian
Well maybe not quite edited but they have no color when they take the pictures. They give them color based on the type of gas and stuff that they are made of. They also adjust the contrast and saturation to make it the most appealing.
#7
Frankie Williamson
God astronoma is awesome.
#8
Chibibar
edited or not (since they just associate color = each type of gas) it is still awesome.
#9
Rob King
Motherfucker. Shit like this makes me want to do that Astronomy/Astrophysics degree after all.
Even though I know the day-to-day is likely not this awesome.