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Aurora over Sweden

It was bright and green and stretched across the sky. This striking aurora display was captured in 2016 just outside of Östersund, Sweden. Six photographic fields were merged to create the featured panorama spanning almost 180 degrees. Particularly striking aspects of this aurora include its sweeping arc-like shape and its stark definition. Lake Storsjön is seen in the foreground, while several familiar constellations and the star Polaris are visible through the aurora, far in the background. Coincidently, the aurora appears to avoid the Moon visible on the lower left. The aurora appeared a day after a large hole opened in Read more »

NASA Administrator, Sen. Cruz, Rep. Babin to Discuss Crew Dragon Test Flight at Briefing in Houston

NASA Administrator Jim Bridenstine, and U.S. Sen. Ted Cruz and U.S. Rep. Brian Babin of Texas will hold a news conference at 1 p.m. CDT Sunday, May 31, at Space Center Houston, the official visitor center of NASA’s Johnson Space Center in Houston, to discuss the successful docking of the SpaceX Crew Dragon spacecraft carrying NASA astronauts Robert from NASA https://ift.tt/3eEgcln via IFTTT

Green Flashes: Sun, Moon, Venus, Mercury

Follow a sunset on a clear day against a distant horizon and you might glimpse green just as the Sun disappears from view. The green flash is caused by refraction of light rays traveling to the eye over a long path through the atmosphere. Shorter wavelengths refract more strongly than longer redder wavelengths and the separation of colors lends a green hue to the last visible vestige of the solar disk. It’s harder to see a green flash from the Moon, not to mention the diminutive disks of Venus and Mercury. But a telescope or telephoto lens and camera can Read more »