Astronomy: Exploring Time and Space
University of Arizona
An introduction to modern astronomy's most important questions. The four sections of the course are Planets and Life in The Universe; The Life of Stars; Galaxies and Their Environments; The History of The Universe.
More resources on Astronomy
SciShow
Accessible science news and education covering biology, chemistry, physics, and earth science with engaging hosts.
Kurzgesagt - In a Nutshell
Beautifully animated science explanations covering astrophysics, biology, philosophy, and speculative scientific concepts.
CrashCourse Science
Engaging video courses covering physics, chemistry, biology, astronomy, and ecology with clear explanations and animations.
Khan Academy Science
Comprehensive free science education platform covering physics, chemistry, biology, and astronomy with interactive exercises and video tutorials.
stellarium.org
Stellarium is a free, open-source planetarium software that realistically simulates the night sky for any location and time, with stars, planets, constellations, and deep-sky objects. The site offers download links, documentation, tutorials, and information about features.
Heavens-Above
Satellite passes and sky info