Airglow is the light of excited atoms, high in Earth’s atmosphere. Yuri Beletsky captured this image on May 10, 2018 at Carnegie Las Campanas Observatory in Chile. You can see the telescope domes in the foreground. He wrote:
Absolutely insane airglow from last night. Yes, what you see on this image are not clouds! That yellow/orangish light comes from the upper atmosphere. I couldn’t believe what I saw on the screen of my camera when I took the first image. It seems the atmosphere is pretty active now and it allows us to witness some incredible views. The Milky Way at parts was barely visible. I hope you’ll enjoy the view!
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. Today, as Lead Editor at EarthSky.org, she helps present the science and nature stories and photos you enjoy. She also serves as one of the voices of EarthSky on social media platforms including Facebook, Twitter and G+. She and her husband live in Tennessee and have two grown sons.