Alone In Space

In 1984, American Space Shuttle astronaut Bruce McCandless made this untethered spacewalk using a jet-propelled backpack. He flew to a distance of about 320 ft (100 m) from the Shuttle, farther than any astronaut had ever before ventured from the safety of their ship.

Exploring the solar system

While humans have remained close to Earth, machines have ventured much farther into space. Robotic probes have explored all but one of the planets, and numerous other objects, returning spectacular images and transforming our view of the solar system.

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