The concept of a habitable zone is useful, but too vague to mean much when we're looking for alien life.

NASA is going to bat for its new rocket, even if it doesn't seem to be the best idea for it to do so.

No matter how much we try to move forward with space exploration, we're being held back.

Welcome to the truly hellish world of WASP-12b, a planet being eaten by its star.

The agency is determined to launch its latest Mars rover no matter what.

NASA's private woes are starting to go public just as a financial crisis grips the country.

NASA is caught between doing science and pleasing skeptical penny-pinchers.