(Fuente: observando)
![Airglow
by Brian Larmay
Airglow (also called nightglow) is the very weak emission of light by a planetary atmosphere. In the case of Earth’s atmosphere, this optical phenomenon causes the night sky to never be completely dark (even after the effects of starlight and diffused sunlight from the far side are removed).[**]](http://25.media.tumblr.com/d57b1f12b78bbb9fc640920014b12571/tumblr_ml0p7796KE1qbn5m1o1_500.jpg)
Airglow
by Brian Larmay
Airglow (also called nightglow) is the very weak emission of light by a planetary atmosphere. In the case of Earth’s atmosphere, this optical phenomenon causes the night sky to never be completely dark (even after the effects of starlight and diffused sunlight from the far side are removed).[**]
(Fuente: ikenbot)
(Fuente: withinthevoid)
The Lagoon Nebula - Infrared and Optical Comparison
This infrared image of the Lagoon nebula contrasts heavily with traditional images taken in visible light. Such images primarily display the striking magenta colour from glowing Hydrogen gas, as well as large dark obscuring clouds of dust.
The infrared part of the spectrum penetrates these clouds better and reveals complex details and thousands of young stars that are otherwise completely invisible. These stars shine primarily in the infrared and appear as golden red in this image. Only a minority of these are visible in traditional optical images. — Rolf Wahl Olsen
