Crash Course Astronomy: Nebulae.

Nebulae Are a Gas!

Nebulae Are a Gas!

Bad Astronomy
The entire universe in blog form
Oct. 18 2015 9:00 AM

Crash Course Astronomy: Nebulae

The star-forming Cat’s Paw Nebula through ArTeMiS’s eyes
The Cat's Paw nebula, seen in visible and millimeter-wavelength light, shows where stars are forming.

Photo by ESO

It’s kinda weird to think that out in space there are gigantic clouds of gas and dust, hundreds of trillions of kilometers across, but as tenuous as laboratory vacuums.

But it’s also kinda awe-inspiring. And pretty. And amazing. And the topic of this week’s Crash Course Astronomy.

If you want to learn more (and yes, you really do) I’ve written about nebulae so many times that I’m not even sure how many posts there are about them here. Hundreds? Probably. You can search on them (switch to “Images” view to pick ones that look interesting), or read a few selected posts here: