The Mars Science Laboratory mission, originally slated to launch next year, has been delayed until 2011, NASA announced today.

China's military-backed space program will send scientists on future manned missions as its demand for technical expertise rises, state media reported Friday.

The clouds are parting on Venus as new images reveal more about the structure of a dense layer that enshrouds the hot planet.

More than 400 years after Danish astronomer Tycho Brahe challenged established wisdom about the heavens by analyzing a strange new light in the sky, scientists say they've finally nailed down just what he saw.

Science editor Alan Boyle's Weblog: A brand-new travel agency is selling front-row seats on an XCOR Aerospace rocket plane that will soar more than halfway to outer space.