SUNSET: 
0
Photographer:
Tim Martin
Location of Photo:
Planet Earth? Numerous locations for this composite
Date/Time of photo:
Numerous... from 2003 - 2025
Equipment:
Many different digital cameras and telescopes
Description:
We live on a sphere! Over 2 millennia ago, ancient Greek observers were able to determine that the periodic occasion that the full moon darkens is due to it passing into the shadow of Earth. Since every time this event occurred, they saw a similar curved shape they were able to deduce that Earth must be spherical. I have observed and photographed lunar eclipses for over four decades. When sitting under the eclipse darkened sky I often wonder if I would have been able to come to a similar conclusion. My first eclipse photos in 1982 were taken with black and white film and used for a high school science fair project. Measuring images of the moon taken during an eclipse I was able to determine the diameter and distance of the Moon. In 2003 I began using digital cameras to photog
