Big splat could explain Moon's far side
Slow impact A new hypothesis claims the Earth may once have had two moons, which eventually crashed together forming our current celestial partner.
Plans to build budget trip to Mars
On the cheap NASA is working with private industry to go well beyond simply supplying ferry flights to the International Space Station, but to Mars o
Dawn gives close-up look at asteroid
Pockmarked protoplanet The first close-up pictures of the asteroid Vesta reveal a surprisingly diverse terrain and several unexplained geologic featu
Astronomers size up the universe
Size matters Scientists have gone back to the drawing board and come up with the most accurate measurement of how fast the universe is expanding.
Trojan asteroid discovered in Earth orbit
Earthly sidekick Astronomers have discovered the first Trojan asteroid sharing Earth's orbit around the Sun.
Trojans are asteroids locked in
Astronomers zero in on star's last gasp
Stellar fate A newly discovered planetary nebula, the last gasps of a dying star, could provide scientists with answers about the ultimate fate of ou
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