----------------------------------- Erwin 29 Iul 2013 09:50 Cursuri online gratuite de la MIT ----------------------------------- Introduction to Astronomy provides a quantitative introduction to the physics of the solar system, stars, the interstellar medium, the galaxy, and the universe, as determined from a variety of astronomical observations and models. Pe site veți găsi toate cursurile predate la MIT (Massachusetts Institute of Technology). Gratis! :)