As we speak within the historical past of astronomy, the primary American satellite tv for pc meets a fiery finish.
James Pickering, James Van Allen, and Wernher von Braun maintain aloft a mannequin of Explorer 1. Credit score: NASA
The U.S. satellite tv for pc program was evolving within the early Nineteen Fifties, first starting at as joint Military-Navy enterprise known as Undertaking Orbiter, then changing into a completely Navy civilian effort with Undertaking Vanguard. However when the profitable launch of Sputnik in October 1957 was adopted by the explosion of the Vanguard rocket on the launchpad in December of that 12 months, it grew to become clear that the U.S. was severely lagging behind the Soviets within the area race. The Military’s satellite tv for pc program was revived.
The Military Ballistic Missile Company, led by Wernher von Braun, and the Jet Propulsion Laboratory, led by William Pickering, collaborated to construct a satellite tv for pc and rocket. In solely 84 days, they’d produced the 30-pound Explorer 1, which was outfitted with a cosmic ray detector designed by James Van Allen.
Explorer 1 launched Jan. 31, 1958, marking the primary main launch of the American House Age. The scientific instrument on board was overwhelmed by readings a lot larger than anticipated, resulting in the invention of the Van Allen radiation belts. Explorer 1 continued transmitting information for nearly 4 months, and even after its batteries died on Might 23, 1958, stayed in orbit round Earth for one more 12 years. On March 31, 1970, Explorer 1 burned up on reentry of Earth’s ambiance.
