Astronomers from the California Institute of Technology (Caltech) and the University of Arizona have released the largest data set ever collected that documents the brightening and dimming of stars and other celestial objects—two hundred million in total.

The extraterrestrial rock is tumbling through space alongside thousands of similar objects in our solar system's main asteroid belt, roughly between the orbits of Mars and Jupiter.

A free application using data from the UA's Catalina Sky Survey reveals a night sky that is surprisingly busy.

NASA's Wide-field Infrared Survey Explorer (WISE) was built to search for "dark" objects in space like brown dwarf stars, vast dust clouds, and asteroids.

A previously undiscovered asteroid passed close to the Earth on Monday after being spotted just 15 hours before the close encounter.