By coincidence, astronomers noticed a black hole as it "woke up" from a decades-long slumber to feed on giant planet that approached too close.
Researchers have discovered exactly how breathtaking disk galaxies get their spiraling arms.
Is there life on Mars? Probably not. But the Mars rover Curiosity may have just gathered evidence that shows something else about the Red Planet.
NASA has now flown the Dragon Eye unmanned aerial vehicle into a volcano plume in order to study the volcano's chemical environment.
Astronomers have witnessed and imaged Supernova 1987A, one of the brightest exploding stars, in unprecedented detail.
This magnificent night image of the greater New York City metropolitan area was taken by one of the lucky Expedition 35 crew members aboard the Earth-orbiting International Space Station.
NASA has released a new image of the "comet of the century," which is set to buzz past the sun in November this year.
Scientists discovered that the strange green rock discovered last year in Morocco may be from the closest planet to the sun, stating that it is the first meteorite from Mercury.
Europe's fourth Automated Transfer Vehicle (ATV), set to supply the International Space Station, now entered the final phase of preparations for its launch on top of the heavy-lift rocket Ariane 5.
A new Russian-American crew arrived at the International Space Station (ISS) Friday after a fast-track trip from Earth which lasted under six hours and carried three astronauts.
How much does it take to catch an asteroid? About $100 million, according to NASA's 2014 fiscal budget request.
Our galaxy is nearly as old as the Universe itself, but there is still some action in the form of newborn stars. The age of the Universe can be determined quite exactly to be 13.8 billion years, while our galaxy, the Milky Way, is also ancient — some of its stars are more than 13 billion years old...