12 in a cloud that expanded to about 400 miles (650 kilometers) in diameter and was clearly visible from the ground. When the spacecraft reached about 97,000 miles (about 156,000 kilometers) from Earth, it released one kilogram of sodium gas on Sept. 9, 1959, the Ye-1A probe, also known at the time as the Second Soviet Cosmic Rocket, successfully lifted off on Sept. 14, 1959: Lunar Impact | 23:02:23 UT In DepthĪfter an aborted launch on Sept. The spacecraft's sensors found no evidence of a lunar magnetic field or radiation belt. The spacecraft scattered spherical emblems of the Soviet Union on the lunar surface. Luna 2 was the first object of human origin to make contact with another celestial body. The spacecraft carried sensors to study interplanetary space and sodium gas to enable Earthbound observers to follow its progress. But it was the first successful attempt for any nation, making the Luna 2 probe the first human-made object to reach the surface of another celestial body. Luna 2, originally named the Second Soviet Cosmic Rocket, was the sixth Soviet attempt to send a probe crashing into the Moon. Baikonur Cosmodrome, Kazakhstan, Russia | Launch Site 1
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