Before you see the sun obscured by the moon for yourself, read Annie Dillard's Total Eclipse.

I saw, early in the morning, the sun diminish against a backdrop of sky. I saw a circular piece of that sky appear, suddenly detached, blackened, and backlighted; from nowhere it came and overlapped the sun. It did not look like the moon. It was enormous and black. If I had not read that it was the moon, I could have seen the sight a hundred times and never thought of the moon once.