2017 Alaska Eclipse
It is well known that Alaska was well out of the path of the 2017 eclipse, or was it? At 9:15 AM on August 21, I was able to shuffle my chemistry class outside and use a 3D printed Alaska shaped pin-hole viewer to see the outline of the moon as it crossed in front of the sun. Alaska was only eclipsed by 37% of the moon, thus we didn't notice any dip in brightness outside, but the shadow cast on the paper we held was impressive, none-the-less. Some students were able to use their cell phones in selfie mode to view the moon, which worked for some.