Tag: photographic plates

  • Science & Tech

    Guardians of the sky

    After a flood threatened to destroy the Harvard College Observatory’s trove of glass plate negatives, staff members and students from around the University showed up to help move the plates to safety.

    4–7 minutes
  • Science & Tech

    Building a stellar time machine

    Harvard researchers are building a celestial time machine that lets astronomers look back at hundreds of thousands of objects in the Earth’s skies over the past century.

    6–9 minutes