The Great American Eclipse of the Sun is coming up on Monday, August 21, 2017.Doug Duncan wearing eclipse glasses

Don’t miss an incredible sight you’ll remember your whole life!  On Aug. 21, 2017 the best Total Eclipse of the Sun in 40 years will cross the U.S.  Every state will have at least 75% of the sun covered by the moon, and lucky people in a 70-mile-wide strip from Oregon to South Carolina will see an amazing TOTAL eclipse.

March 1970 Eclipse Expedition

I’m Dr. Doug Duncan, CU Astronomer and Fiske Planetarium Director. I’ve been studying the sun, stars like the sun, and chasing eclipses for over 40 years.  A partial eclipse is interesting to watch.  If you protect your eyes you can see the moon take a big bite out of the sun. The total eclipse is much, much more spectacular.  It looks like the end of the world, with loops of hot gas –prominences – leaping off the edge of the sun, and big silver streamers of the sun’s corona stretching across the sky. It gets dark and cold - there's a black hole in the sky where the sun should be. People cry, scream, shout, and celebrate. Animals do strange things. If you can travel to where the eclipse is total – do it!

The image below is a map of the "path of totality".  Click this map to see a video that explains the eclipse and how to view it safely.

Eclipse graphicMap Credit: Michael Zeiler at and Fiske Planetarium

Click the image below to watch a video explaining Frequently Asked Questions (FAQs) about the 2017 eclipse.

FAQ Eclipse Video image