Watch 2012: Supernova for Free: How to Stream the Movie Online at 123Movies. . Two hundred years ago a supernova exploded somewhere in the Lyra constellation. Now the lethal burst of radiation is headed straight for Earth, and time is swiftly running out. The only thing standing between humanity and complete devastation is astrophysicist Dr. Kelvin (Brian Krause), who heads up a project to save the planet.