exploding stars

Super giant sharks, whale-sized sea cows ... have become extinct because a series of stars exploded before dying, at a distance close enough to launch radiation down to Earth.

Cosmic rays come from supernova explosions and the Sun's magnetic activity affects the weather on Earth.

This is challenging astronomers. Although, over many years of searching, there is no confirmation of our alien life.

While astronomers use a Spitzer space telescope to search for a supermassive black hole in the center of a distant galaxy, the team suddenly discovers an unusually hot cloud of