Encore - Frosted Globe
December 07, 2019
Today and every Saturday Earth Science Picture of the Day invites you to rediscover favorites from the past. Saturday posts feature an EPOD that was chosen by viewers like you in our monthly Viewers' Choice polls. Join us as we look back at these intriguing and captivating images.
Photographer: Daniela Rapava
Summary Authors: Daniela Rapava; Jim Foster
The photo above shows a frosted bubble that's resting on an elevated surface, just above the ground, outside of the observatory in Rimavska Sobota, Slovakia. It’s approximately 1 in (2.5 cm) in diameter and was created from water, detergent and sugar. This bubble became frosted in a little more than 7 minutes. The air temperature at the time was 19 F (-8 C), but the ground temperature was likely several degrees colder. There was sufficient water vapor in the cold air to coat the bubble in frost crystals –- like frost on a windowpane. I noticed that this frost painted the bubble from the bottom up. Photo taken on the morning of February 5, 2014.
Photo Details: Camera: Canon EOS 40D; Lens: EF100mm f/2.8 Macro USM; Focal Length: 100mm; Focus Distance: 0.63m; Aperture: f/13.0; Exposure Time: 0.0016 s (1/640); ISO equiv: 200.
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