Cosmos was an amazing series for its time, I think I watched it spellbound when it first aired. Another favorite of mine I need to get sometime, although occasionally it is repeated on the more obscure "science" cable channels.
I watched an equally fascinating show just last night about gigantic black holes found in the center of nearly every galaxy so far. It is amazing what they are finding out about the universe in my lifetime, I can only imagine what they will learn long after I am gone, which is one reason I wish I could be around a lot longer than I will be.