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Timelapse: Anticrepuscular Rays at Monument Valley
Astrophotograher César Cantú from Mexico is visiting Utah and captured an incredible timelapse of the view at sunset along with the formation of anti-crepuscular rays — a spectacular optical phenomena where light rays scattered by dust and haze appear on the horizon opposite to the setting Sun.
The word crepuscular means “relating to twilight,” and these rays occur when objects such as hills or clouds partially shadow the Sun’s rays, usually when the Sun is low on the horizon. These rays are visible only when the atmosphere contains enough haze or dust particles and in just the right conditions, sunlight is scattered toward the observer.
Then occasionally, light rays scattered by dust and haze sometimes appear on “antisolar” point, (the horizon opposite to the setting Sun). These rays, called anti-crepuscular rays, originate at the Sun, cross over the sky to the opposite horizon, and appear to converge toward the antisolar point.
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Read the rest of Timelapse: Anticrepuscular Rays at Monument Valley (167 words)
© nancy for Universe Today, 2014. |
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Post tags: Anti-Crepuscular Rays, Crepuscular Rays, Monument Valley, Timelapse, Timelapse videos
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Source: http://www.universetoday.com/112222/timelapse-anticrepuscular-rays-at-monument-valley/
