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4 Vesta: stories to listen to | HearLore
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4 Vesta
Dawn (spacecraft)Harold R. Kaufman built the first working ion thruster in 1959 at NASA's Glenn Research Center in Ohio. This early engine used mercury as its propellant and…
4 VestaHeinrich Wilhelm Matthias Olbers discovered 4 Vesta on the 29th of March 1807 in the constellation Virgo. This event marked the fourth object found in what…