Launched on May 18, 1969, the Apollo 10 lunar mission sent three men, Thomas P. Stafford, John W. Young, and Eugene A. Cernan, into orbit around the moon, the first mission in history to do so. When their command module, nicknamed "Charlie Brown", orbited to the far side of the moon, communication with Earth was impossible, since the moon readily blocked radio transmissions. However, in place of mission control’s far away voice, the crew instead picked up on a mysterious transmission, according to a new documentary.
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The formation of the Earth-Moon system has long been theorized to have been heavily influenced by the impact of a Mars-sized celestial body, commonly called "Theia" by scientists. The Moon’s formation is theorized to have occurred when this object struck the primordial Earth, spinning off a portion of it’s mass, that formed into the Moon as we know it today. However, a common question has dogged the issue since it’s conception: did Theia just strike a glancing blow to the primordial Earth, or did it strike it head-on?
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