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Modern Physics: Theoretical Minimum series by Leonard Susskind (Lecture Notes and Books).

CMB Tutorials by Wayne Hu

GMU PHYS428 Text: Relativity: Special, General, and Cosmological by Wolfgang Rindler

Dr. Richard Feynman’s Messenger Series lectures. The three volume Feynman Lectures On Physics

...and unlikely to miss

The OpenCourseWare Consortium. Stanford Online. MIT OpenCourseWare

fun ...

pan around outer space with the virtual WorldWide Telescope.

... and not so fun

books I'm struggling with ...