LTB

The Great Courses has some really good astronomy courses.  They are basically a series of 30 minute lectures that you can download and read at your own pace.  If you keep an eye on them you can get them very cheap from time to time.  I got Hubble for like $10 bucks.  Other courses I have gotten for like $30 bucks.   They are very good courses and give you a very solid foundation in the physics and understanding of the universe, galaxies and our own solar system.  I recommend them quite highly IF you wait to purchase one when its on significant sale....I have bought courses for 30 bucks that normally sell for 650.00 dollars so dont be shocked when you see some of the prices....they regularly go on sale for very, very reasonable prices.