The Nemesis Conjecture: Is an Unseen Binary Companion of the Sun Sending Comets Towards Earth?

The Nemesis Conjecture: Is an Unseen Binary Companion of the Sun Sending Comets Towards Earth?: "Some scientists believe that something could be hidden beyond the edge of our solar system a distance of about 50,000 to 100,000 AU (about 1-2 light years), somewhat beyond the Oort cloud. Named “Nemesis” or “The Death Star,” this undetected object could be a red or brown dwarf star, or an even darker presence several times the mass of Jupiter. "