Make sure to look at the gif for at least 20 seconds, otherwise it won’t work that well! This is definitely the most fun I’ve had while making a post.

Inspired by this one from capnphaggit. Images & copyrights: Trifid Nebula (M20) by Marcus Davies,
The Cat’s Eye Nebula and Star-forming region Sharpless 2-106 by NASA, ESA, the Hubble Heritage Team (STScI/AURA). P
lease don’t remove the credits.


NASA Astronomy Picture of the Day 2016 January 27 

An Airglow Fan from Lake to Sky 

Why would the sky look like a giant fan? Airglow. The featured intermittent green glow appeared to rise from a lake through the arch of our Milky Way Galaxy, as captured last summer next to Bryce Canyon in Utah, USA. The unusual pattern was created by atmospheric gravity waves, ripples of alternating air pressure that can grow with height as the air thins, in this case about 90 kilometers up. Unlike auroras powered by collisions with energetic charged particles and seen at high latitudes, airglow is due to chemiluminescence, the production of light in a chemical reaction. More typically seen near the horizon, airglow keeps the night sky from ever being completely dark.


Since it’s the first thing someone considers buying a new telescope, Israeli astronomer Michael Vlasov illustrates which views can you expect to get through different telescopes.

On his page, he covers the Moon, planets, Sun, Deep sky objects, comets, double stars, light pollution, and shares a lot of other useful information. 

Image copyright © DeepSkyWatch.com 2015