Astronauts aboard the International Space Station are on a space walk Wednesday to make repairs on the space station's cooling system
Solor flares, or coronal mass ejections, are eruptions of plasma and ionized atoms into space. As these atoms reach Earth, solar particles stream down the planet's magnetic field lines toward the poles.
Meteor shower enthusiasts will be able to enjoy this year's Perseids this week, which will peak on the night of August 12.
Robonaut 2, a humanoid robot headed to the International Space Station, is a 'friendly robot' and has nothing to do with the villainous 'Star Wars' bounty hunter, say NASA officials.
A NASA task force says the space agency should make protecting the planet a strategic goal.
Two experimental US missile defense satellites have passed a series of vital tests in space, successfully spotting three missile launches and relaying their data back to Earth.
Every 27 million years, there is a much higher likelihood of a mass extinction. Some astronomers have proposed that these extinctions are caused by a small comet-disturbing star orbiting our sun, the so-called Nemesis hypothesis.
Virgin Galactic SpaceShipTwo spacecraft, the VSS Enterprise, could make its first drop flights over California's Mojave Desert for glide and landing tests this fall, says the company.
Astronomers have long warned of a nasty encounter with a large space rock, but don't worry: There's a proposal in Congress to establish a commission to look into it.
An open letter to Congress signed by 24 former NASA astronauts told Congress that privately owned spacecraft could carry people safely to the International Space Station.