12 maio 2017

Planet Aurora


What bizarre alien planet is this? It's planet Earth of course, seen from the International Space Station through the shimmering glow of aurorae. About 400 kilometers (250 miles) above Earth, the orbiting station is itself within the upper realm of the auroral displays. Aurorae have the signature colors of excited molecules and atoms at the low densities found at extreme altitudes. Emission from atomic oxygen dominates this view. The eerie glow is green at lower altitudes, but a rarer reddish band extends above the space station's horizon. Also visible from the planet's surface, this auroral display began during a geomagnetic storm. The storm was triggered after a coronal mass ejection impacted Earth's magnetosphere in June of 2015.

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The Eskimo Who Started A Mining Boom

Alaska is the only U.S. state to produce platinum. Half a million ounces have been mined from southwestern Alaska since the first platinum nugget was discovered there by an Eskimo named Walter Smith in 1926.

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historical-nonfiction: Two things make this brooch special. The...

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Rocket Blasts Off During 2017 Student Launch Challenge


Nearly 50 student teams from middle and high schools, colleges and universities in 22 states demonstrated advanced rocketry and engineering skills in NASA's 2017 Student Launch challenge. Teams spent eight months building and testing rockets designed to fly to an altitude of one mile, deploy an automated parachute system, and safely land for reuse.

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To ancient Romans, serpents were friends, not feared. Genius loci was the protective spirit of a...

To ancient Romans, serpents were friends, not feared. Genius loci was the protective spirit of a place. Every house and business had a genius loci, and they traditionally took the form of a snake.

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VISIT –> http://ift.tt/1eWNk1f for quality...



VISIT –> http://ift.tt/1eWNk1f for quality psychology information and resources.

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