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Astronomy Picture of the Day 20171205

0 comments, 109 views, posted 1:07 pm 05/12/2017 in Sci-Fi, Science & Space by evolution
evolution has 13293 posts, 6499 threads, 1178 points
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A Horizon with Blue and Red

What's happening on the horizon? The horizon itself, past a spinach field in Guatemala, shows not only trees but a large volcano: the Volcán de Fuego (Volcano of Fire). The red glow at the top of the volcano is hot lava. But your eye may also be drawn to the blue circle above the horizon on the left. This circle surrounds the Moon and, together with other colors, is called a corona. A corona is caused by diffraction of light -- here moonlight -- by small water droplets in the Earth's intervening atmosphere. A break in the clouds on the right shows stars and even the planet Saturn far beyond the volcano. Although Volcán de Fuego frequently undergoes low-level activity, the astrophotographer considered himself lucky to capture the scene just during an explosive eruption in late September.

Image Credit & Copyright: Sergio Montúfar (Planetario Ciudad de La Plata) via apod.nasa.gov

Extra Points Given by:

Eavesy (5), REALITY (10), Paracelsus (10)

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