1917 astronomical plate provides image of planet outside our solar system

It's not every day that you find a scientific discovery in your basement. That's what happened to scientists at the Cargenie Observatory after they stumbled on a 1917 astronomical glass plate. They believe the plate offers the oldest evidence for a planet orbiting star. Previously it was thought, the first exoplanet detection was made 75 years later in 1992. The pull-out box shows the strong lines of the element calcium.