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July 15th in Astronomy and Space Science
Unmanned Spaceflight1972Pioneer 10 becomes the first spacecraft to enter the asteroid belt. On 3 December 1973 it passed within 130,354 km (81,000 miles) of Jupiter's cloud tops , obtaining the first close-up images of the planet and charting the intense radiation belts and magnetic field. Pioneer 10 is headed in the general direction of the star Albebaran in the constellation Taurus. At a distance of 68 light years, the spacecraft travelling at 132,000 kph (82,000 mph), will take about 2 million years to reach it.
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