A total solar eclipse occurs when the Moon passes between the Sun and the Earth. If you are standing in the path of the Moon's shadow, you see the light from the sun blocked. At totality (image above), the entire disk of the Sun is blocked by the Moon and you can see the solar corona.
On July 22nd there was a total solar eclipse. The eclipse could have been seen from many places in eastern Asia including India and China. This eclipse is being called the "eclipse of the century." The reason is that the sun was eclipsed for more than six minutes. This is the longest totality of any eclipse this century. NASA even saw a partial eclipse with the Hinode satellite (above). This is taken in the x-ray part of the light spectrum.If you want to see more images you can find some on the Discovery Channel website or at NASA.
Images Courtesy NASA/JAXA