Why Was September’s Lunar Eclipse So Dark?
The September 17, 2015 total lunar eclipse was darker than expected. Several factors including the Moon’s location in Earth’s shadow and volcanic dust may have been at play. This photo was taken in Washington’s Olympic National Park during totality. Credit: Rick Klawitter
First off, a huge thank you to everyone who made and sent their Danjon scale estimate of the totally-eclipsed Moon’s brightness to Dr. Richard Keen, University of Colorado atmospheric scientist. Your data were crucial to his study of how aerosols in Earth’s atmosphere and other factors influence the Moon’s appearance.
Grateful for your help, Keen received a total of 28 observations from 7 different countries.(…)
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