CNN’s Tom Foreman breaks down what we know about the interstellar comet that originated outside our solar system.

Scientists may have made an "out of this world" discovery. New research suggests that a mysterious glow in our galaxy might be caused by dark matter, an invisible form of matter believed to be five ...

Scientists out of the Pan-STARRs observatory in Hawaii discovered the new quasi-moon on Aug. 29, according to CNN and ABC News. It is believed that PN7 has been a quasi-moon for an estimated 60 years.