Many years before President Trump expressed his intention to send an American crewed mission to Mars, Wernher von Braun ...

For a brief, but exciting, time last year, Earth had two moons. A small asteroid lingered close to our planet in its orbit ...

The asteroid is about 33 feet (10 meters) across and poses no danger to Earth. It joins another known lunar asteroid ...

Flickering coronal "loops" on the Sun are warning signs of a coming solar eruption, paving the way for better space weather ...