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Astro Bob

See The Sunbeams Of Summer

8 Jun 2019, 15:28 UTC
See The Sunbeams Of Summer
(200 words excerpt, click title or image to see full post)

Crepuscular rays or sunbeams fan across the sky earlier this week. Bob King
Sometimes all you have to do is walk outside and look up to see something amazing to see in the sky. Earlier this week I happened to be driving in the right direction when a ragged cumulus cloud covered the sun, creating a fan of beautiful sunbeams and shadows across the western sky. I stopped the car and to the bemusement of a few nearby cows took a few photos of the scene. Those sweeping beams of dark and light are called crepuscular rays. Crepuscular (cree-PUSS-cu-ler) comes from the Latin word “crepusculum” meaning twilight. They can occur anytime but we’re more likely to notice them when the sun is low in the sky especially just before sunset or after sunrise. Puffy, textured clouds make the best displays.
If you look closely at the photo you can see that where a bulb of cloud is thick enough to block the sunlight, it casts a shadow. Bright beams are places where sunlight finds holes or openings in the cloud it can shine through. Together, they create a fan of alternating bright and dark rays crowning the western sky in ...

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