Science

NASA satellites capture massive "fireball" exploding over the Bering Sea

Credit: NASA/GSFC/LaRC/JPL-Caltech, MISR Team.

Images were released this week of a "fireball" that exploded nearly 16 miles over the Bering Sea on Dec. 18, 2018, captured by 2 powerful NASA instruments aboard the Terra Satellite.

Details: The fireball — indeed, the scientific name of these radiant meteors — released an estimated 173 kilotons of energy — roughly 10 times the energy of an atomic bomb, however given its altitude and remote destination, posed no peril on Earth. This was the strongest meteor observed from Earth since 2013.

Everything you need to know about the Boeing 737 MAX crashes

Boeing 737 MAX airplane
Photo: Stephen Brashear/Getty Images

Following 2 similar crashes of Boeing 737 MAX 8 planes that killed a total of 346 people, the aircraft have been grounded worldwide as a series of investigations look into what caused the crashes and any potential flaws that went unnoticed during the safety certification process.

Context: The plane was approved in a way that allowed airlines that already flew other versions of the best-selling 737 series to treat it as another in the series. This limited the training requirements for 737 MAX pilots, and kept customer costs down. However, in reality, the plane had many new pieces of hardware including more powerful engines, a redesigned tail, new wing design and, crucially, new software.

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