Astronomy Background
Nick Strobel's Online Astronomy Notes
Hyperphysics Astrophysics Notes
Michael Richmond's Guide to Astornomical Jargon
The SAO Encyclopedia of Astronomy
Stellar Spectra
Online Notes for Galaxy Courses
Bill Keel's Galaxy Lecture Notes
Mark Whittle's Online Extragalactic Astronomy Notes (1st/2nd year graduate)
Astronomy News and Images
Astrobites astro-ph Reader's Digest
AAS Nova: summaries from astronomy research papers, includes galaxy news
Astronomy
Picture of the Day
Science Daily Galaxy News
Bad Astronomy
Last updated: December 28, 2018