https://still-orbiting.neocities.org/Still_Orbiting/Still_Orbiting-main
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Links (free resources)
- Feynman lectures on physicsFull lecture series from Richard Feynman (an American theoretical physicist)
Includes topics to pick from too!
A wikipedia book that explains general astronomy topics, consists of 333 pages
Seamac on internet archive provides great telecourses on various interesting topics, including astronomy!