Tag: photographic plates

  • Nation & World

    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.

    5 minutes
  • Nation & World

    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.

    8 minutes