RT @sciam: Astronomers have found the most powerful supernova ever seen bit.ly/1ZnhguN By @LeeBillings https://t.co/ajCyV1o9Ui
RT @sciam: Astronomers have found the most powerful supernova ever seen bit.ly/1ZnhguN By @LeeBillings https://t.co/ajCyV1o9Ui