RT @sydneyobs: Observations blog: Daily cosmobite: supernova anniversary – On this day in 1987 astronomers saw a star explode in … http:/ow.ly/2E7eG6
RT @sydneyobs: Observations blog: Daily cosmobite: supernova anniversary – On this day in 1987 astronomers saw a star explode in … http:/ow.ly/2E7eG6