If you are a space enthusiast, this is well worth 400 seconds of your time for the unique perspective it offers…like strapping a HERO Go Pro camera to a booster and getting it back.
From the NASA/Goddard Space Flight Center Science nugget: Lightning signature could help reveal the solar system’s origins Every second, lightning flashes some 50 times on Earth. Together these discharges coalesce and get stronger, creating electromagnetic waves circling around Earth, to create a beating pulse between the ground and the lower ionosphere, about 60 miles up…
Here is a chilling story of how the best engineering and design can go horribly wrong in the face of test after test. Wayne Hale relays this story about how Space Shuttle Discovery was nearly lost after a complete redesign and safety overhaul. Highly recommended – Anthony
From Slashdot: BJ_Covert_Action writes: “NASA engineers have finally discovered the root cause of the cracks that have been found on space shuttle Discovery’s main external tank. The main tank, one of the ‘Super Lightweight Tank’ models developed by Lockheed-Martin, employs an aluminum-lithium alloy developed by Lockheed-Martin specifically for this application.