Perseid Meteors Over Ontario . ... That is why the meteor shower that peaked over the past few days is known as the Perseids -- the meteors all appear to come from a radiant toward Perseus . Three dimensionally, however, sand-sized debris expelled from Comet Swift-Tuttle follows a well-defined orbit about our Sun, and the part of the orbit that approaches Earth is superposed in front of the Perseus. ... Gallery: Highlights of the 2013 Perseids Meteor Shower . ... NASA Official: Jay Norris. ...