APOD: 2013 April 20 - Airglow, Gegenschein, and Milky Way Image Credit & Copyright: Yuri Beletsky (Las Campanas Observatory, Carnegie Institution)
“Unlike aurorae powered by collisions with energetic charged particles and seen at high latitudes, the airglow is due to chemiluminescence, the production of light in a chemical reaction, and found around the globe.”
APOD: 2013 March 27 - A Horizon Rainbow in Paris photo by Bertrand Kulik
“It’s uncommon appearance is caused by the Sun being unusually high in the sky during the rainbow’s creation. Since every rainbow’s center must be exactly opposite the Sun, a high Sun reflecting off of a distant rain will produce a low rainbow where only the very top is visible — because the rest of the rainbow is below the horizon.”
USS John C. Stennis enters Joint Base Pearl Harbor-Hickam. (by Official U.S. Navy Imagery) photo by Mass Communication Specialist 2nd Class Daniel Barker
“The aircraft carrier USS John C. Stennis (CVN 74) enters Joint Base Pearl Harbor-Hickam as friends and family members of Sailors greet them from shore.”
Texas’s Fertilizer Plant Explosion - In Focus - The Atlantic “Aerial view of the damage left behind by a massive explosion at the West Fertilizer Company, on April 18, 2013. (Chip Somodevilla/Getty Images)”
Photos of the Day: April 22 - Photo Journal - WSJ “A man ran with his daughter on his back to avoid falling rocks amid earthquake aftershocks in Ya’an, Sichuan province, China, Sunday. At least 192 people were killed, more than 11,000 were injured and 23 were missing after an earthquake struck the province early Saturday. (Agence France-Presse/Getty Images)”
Dropped in the Dust (by United States Marine Corps Official Page) photo by Staff Sgt. Kenny Holston
“A U.S. Marine Corps CH-53 Super Stallion helicopter lands at Camp Al-Galail, Qatar, to drop off several Marines assigned to Lima Company, 3rd Battalion, 2nd Marines, 26th Marine Expeditionary Unit, for Exercise Eagle Resolve 2013 April 21.”
