NASA is monitoring a bus-sized asteroid as it makes its closest approach to Earth today, among a group of five space rocks ...

New Southwest Research Institute-led modeling indicates the main belt asteroid (52246) Donaldjohanson may have formed about 150 million years ago when a larger parent asteroid broke apart; its orbit ...

The precise VLT observations, along with data collected by other observatories, allowed astronomers to more accurately model the asteroid's orbit and assess its impact probability, according to a ...

The team identified two physical processes ... of the four-billion-year-old asteroid. Apophis, set for the flyby on April 13, 2029, is a 'city-killer' space rock the size of the Empire State ...