ACEIZE Tracking the current state of Science and Technology

Recent research reveals that our Sun is not likely to have a companion star. In 1984 this proposed companion star was named Nemesis. Nemesis was proposed as an explanation of the roughly 27 million year cycle of mass extinction that occurs on planet Earth. The idea was that companion brown dwarf star (ie, Nemesis) would be in an orbit that would occasionally attract a high number of asteroids and comets from deep outer space. These asteroids and comets would occasionally meet up with the Earth's surface and cause mass extinction. The recent research by Adrian Melott and Richard Bambach, however, shows that the orbit necessary for this to happen is not possible.