Monday, 18 December 2017

Seeing an X-Plane's Sonic Boom


This schlieren image shows an Air Force Test Pilot School T-38 in a transonic state, meaning the aircraft is transitioning from a subsonic speed to supersonic. via NASA http://ift.tt/2kHqUNB

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An Eye-catching Star Cluster

Westerlund 1 is the biggest and closest “super” star cluster to Earth. Data from Chandra and other telescopes are helping astronomers delve...