License: Creative Commons - Attribution Author: Hypatia Alexandria
Something a little different: The Milky Way over Earth's limb, captured from over 400 kilometers above the Pacific Ocean by astronaut Kjell Lindgren. Processed for natural color by me.
This is a natural color image, meaning that star colors correspond to their spectral type and narrowband emissions match their wavelength. Alongside the Milky Way in this image is the presence of 3 different types of airglow:
Near the Earth's limb at around 90km up are airglow caused by 558nm atomic oxygen emissions (Chartreuse green) and 589.3nm sodium emissions *Yellow).
Higher up at around 150 to 350km the glow is caused by emissions from atomic oxygen at 630nm (Red) and also Hydroxl (OH) emissions.
Nikkor 28mm f/1.4
Adobe DNG Converter
Adobe Camera Raw
Adobe Photoshop CS5.1
Credit: NASA/Kjell Lindgren/Hypatia Alexandria