Video Archive

  • Charon at 40: Four Decades of Discovery on Pluto’s Largest Moon

    The largest of Pluto’s five moons, Charon, was discovered 40 years ago today by James Christy and Robert Harrington at the U.S. Naval Observatory in Flagstaff, Arizona – only about six miles from where Pluto itself was discovered at Lowell Observatory. They weren’t even looking for satellites of Pluto – Christy was trying to refine Pluto’s orbit around the Sun.

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  • System can 3-D print an entire building

    Tech could enable faster, cheaper, more adaptable building construction

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