The first total solar eclipse to cross the U.S. from coast to coast in almost a century occurred today (August 21, 2017). It was a must-see event. In my home town of Eugene, Oregon, the obscuration (amount of the sun’s disk that’s obscured by the moon) was 99.3%. We were geographically about 40 miles south of the shadow’s extent for complete darkness, but our location did not disappoint. Below are four photos, taken with my camera, showing the progression of the moon crossing in front of the sun’s disk.
A total eclipse is a phenomenal natural spectacle. To us humans both objects appear to be the same size in the sky, this is because our star (the Sun) is 400 times wider than the moon and it is 400 times farther away from Earth than the moon. Even in the cosmos such a splended match up of size and distance for intelligent life to observe is likely a rare occurrence.
This composite photo shows the trees and valley thirty minutes prior to (left) and at the height the eclipse (right). During this time the sky became very dark and there were no bird sounds. The temperature also dropped 15 to 20 degrees Fahrenheit!
From my vantage, I could see about 20 miles south and about 40 miles north. The northern view was dark, the southern direction was sunny; in between this gulf of sixty miles was a gradient between the darkness and light. My wow moment was realizing that such an immense shadow, and on such a grand scale was made by the moon which is indeed very, very big.