The Quadrantid meteor shower peaks in early January, offering dazzling fireballs and up to 120 meteors per hour.

Because such a structure would likely have a radius of around one astronomical unit (the distance from the Earth to our Sun), ...

AB, a 42-foot Near-Earth Asteroid, will pass just 95,200 miles from Earth, providing scientists a unique chance to study it ...

Its highly elliptical orbit around the sun brings it as close as 1.03 astronomical unit (AU) to our home star and as far out as 10.37 AU. (One astronomical unit is the average distance between ...

St. Louis County Prosecuting Attorney Melissa Price Smith in one of her first interviews said she will run for the elected office in two years — and she intends to ...

The energetic flare, which lasted approximately three days and suggests an emission region of less than three light-days in size (~170 AU, where 1 Astronomical Unit is the distance from the Sun to ...

A sphere which had a radius of 1 astronomical unit (the average distance between Earth and the sun) would require more material than exists in the entire solar system. It is far more likely that ...