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A comment on Hubble takes gigantic image of the Triangulum Galaxy. Parent comment

Re:Hubble takes gigantic image of the Triangulum Galaxy by jzl on Thursday January 10, 2019 @02:38AM (#18872198)
Don't know specifically about this one but many aren't. The Pillars Of Creation isn't[1]. Also we humans can never see most of space in "true color" with our own eyes, even in a telescope, because the brightness of the incoming light is so low that our eyes are detecting the photons via color-insensitive rods rather than cones. Only a time-lapse photo can bring out the real colors.

[1] http://hubblesite.org/image/351/news_release/1995-44 -- "The color image is constructed from three separate images taken in the light of emission from different types of atoms. Red shows emission from singly-ionized sulfur atoms. Green shows emission from hydrogen. Blue shows light emitted by doubly- ionized oxygen atoms."

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Re:Hubble takes gigantic image of the Triangulum Galaxy by ygra on Thursday January 10, 2019 @06:07AM (#18873006)
This one [-7] is visible-light and doesn't look too different, though. The infrared one [2.4] looks very cool, too.

[-7] http://hubblesite.org/image/3471/news_release/2015-01

[2.4] http://hubblesite.org/image/3475/news_release/2015-01

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Re:Hubble takes gigantic image of the Triangulum Galaxy by Keysh on Thursday January 10, 2019 @06:38AM (#18873143)
The first image [-7] is basically the same as the classic WFPC2 image jzl was referring to -- i.e., using the same mapping of emission-line filters to R, G, and B -- just using a newer camera.
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