On October 14, there will be an annular solar eclipse observable mainly in the western United States, but it will also be partially observable in Pennsylvania. Why is it called an annular solar eclipse, and what makes it different from a total solar eclipse? Find out from Prof. Chris Palma in this episode of Wonders of the Night Sky.
Watch a livestream of the annular solar eclipse on October 14 at science.nasa.gov/eclipses
