Fabulous physics video

Do your eyes roll up into your skull when you hear the word “physics?” Does the Theory of Relativity make your brain frizz up more than Einstein’s hair? Then it’s time to watch this video:

Relativity & The Equivalence of Reference Frames – 2017

Astronomy humor

Star types explained by XKCD.com

This article is about Eta Carinae, a luminous blue hypergiant with anomalous Fe[ii] emission spectra. For the 1998 Brad Bird film, see The Iron Giant (film).