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Here is your text cleaned and split into smooth TTS chunks only: --- Humans just went farther from Earth than ever before… But why? This was the second of four planned NASA missions… to go back to the Moon… with the goal of eventually establishing a Moon colony. So, the crew set off on a 10-day journey. First, traveling around Earth… in a high orbit. During that time, astronauts checked the ship… and tested life support… navigation… and communication.