A new theory suggests the two moons then crashed together, forming our current moon.
The shuttle's smooth landing closes the curtain on a 30-year program that carried people to space.
The shuttle names Columbia, Atlantis and Discovery may ring a bell. But ever hear of OV-95? Few have and now it, too, will be retired.
After Wednesday's successful satellite launch, Iran sets its sights on putting a monkey into space this summer.
Sci-fi enthusiasts and conspiracy theorists tend to obsess about the possibilities of a space-faring Third Reich. But is there any factual basis for these outrageous fantasies?
The Aquarius satellite will measure the salinity of the world's oceans to see how changes may be linked to future climate.
Since the early 1980s, Glenn Martin has been working to create a jetpack suitable for everyday use by ordinary people.
Guest commentator and co-founder of Project Icarus, Richard Obousy explores some "disruptive technologies" that might push us to the stars sooner than we think.
Guest contributor Adam Crowl looks at the fuel required for an interstellar trip and finds a gas giant with huge mining potential.
British and European space agencies have given the go ahead for the development of a reusable spaceplane that's been under development for 30 years.