An asteroid the size of a city block will pass by Earth this weekend, but have no fear: There's no danger of it hitting our planet.

Mars may have a really bad day next year on October 19th.

A massive coronal mass ejection (CME) has put NASA’s Curiosity rover in a direct line of fire

Some people believed they were witnessing a plummeting plane, a military attack, or a UFO

A strange-looking distant galaxy spotted by the Hubble Space Telescope.

NASA’s Cassini spacecraft has taken stunning new photos of Venus, according to a space agency news release.

NASA's Mars rover Curiosity is out of safe mode and back on active status after computer trouble had sidelined the vehicle for nearly a week

Remember that massive meteorite that crashed down in Russia last week? Well, it arrived a couple thousand years before scientists had predicted

NASA says the International Space Station has lost contact with NASA controllers in Houston.

Many South Floridians reported seeing a flare-like object in the sky Sunday night, and one person may have captured it on video.

Astronomers are coming to believe that some of the solar system's moons might be more likely places to search for life than Mars.

A good hearty conspiracy theory can shine a sharp light on two of humanity's most enduring traits.

Russian Deputy Prime Minister Dmitry Rogozin Saturday proposed establishing a common defense system to counter space threats

The extraterrestrial double whammy that Earth only partially avoided on Friday has triggered an immediate response from astronomers.