An astronaut aboard the International Space Station has shared a striking photo of what is known as a Transient Luminous ...

Since Kepler's laws of motion dictate that celestial bodies orbit more slowly when farther from the sun, we are now moving at ...

NASA said the comet will make its closest approach to the sun in late October, scooting between the orbits of Mars and Earth ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

After launch, the Polaris Dawn crew will travel into an oval-shaped orbit that extends as high as 870 miles from Earth. That’s well into the inner band of Earth’s Van Allen radiation belts ...