This month will usher in two separate conjunctions — one between the moon and a rarely-visible Mercury, and another between ...

New research on the orbits of these mysterious asteroids near Venus stress the need for better space rock surveillance.

NASA is monitoring three asteroids soaring past the Earth at about 8,000 to 15,000 miles per hour, the biggest of which measures around 1,300 feet in diameter.

As a result of the International Astronomical Union’s 2006 demotion of Pluto from planet to dwarf planet, our solar system ...