Well, Feynman was one of the most brilliant scientists in history, but he was also quite insane. (As one of his students, I say this with a great deal of love a

Well, Feynman was one of the most brilliant scientists in history, but he was also quite insane. (As one of his students, I say this with a great deal of love and respect for him!) To answer your question, though, we need to distinguish between a partial eclipse and a total eclipse. You had best use eye protection for a partial eclipse, or even better, use a pinhole projector as I described elsewhere in this thread. (Search the page for my username.) But a total eclipse is perfectly safe to view with the naked eye, and even with binoculars! You could use a telescope, but binoculars give you a better field of view. Either way, you're not looking at the sun any more, you're looking at the solar corona. During totality, the sun is completely blocked by the moon itself. This is a much more substantial filter than anything you could ever buy on Amazon.