There are only six of them: radon, helium, neon, krypton, xenon and the first molecules to be discovered in space…
Crab Nebula in a widefield, narrowband image. Credit: Nick Howes This gorgeous shot of the Crab Nebula, or M1, by…
[/caption] It's one of the most famous sights in the night sky... and 957 years ago it was bright enough…
[/caption] From a NASA press release: The famous Crab Nebula supernova remnant has erupted in an enormous flare five times…
[/caption] The Crab Nebula is one of the most popular targets for astronomers of all stripes. It is readily viewable…