Space shuttle 'Endeavour's seven astronauts climbed aboard their spaceship for the start of a 15-day mission.
Telescopes on land have caught the first real visual images of multiple planets orbiting another star.
NASA officials have lost touch with the Phoenix Mars Lander and are calling an effective end to its mission.
High-resolution photographs have revealed more recent volcanic activity than previously thought.
A computer simulation showing the formation and evolution of a galaxy like the Milky Way points to where scientists should look to spot dark matter, international researchers reported on Wednesday.
The Hubble Space Telescope is back in business after a month of problems.
From spent rocket stages and old satellites to lens caps, bolts, and chips of paint, it’s all up there drifting around in outer space.
NASA engineers have traced two glitches that shut down the orbiting Hubble space telescope.
NASA satellite to study distant regions where outermost reaches of our solar system collide with the cold expanse of interstellar space.
A NASA spacecraft zoomed above the surface of Mercury, viewing rocky terrain never before seen up close.