The teams behind two potential new space telescopes have embarked on their final design studies as they go head-to-head to ...

NASA's Spitzer Space Telescope "has opened up half the universe to us." In the process, it has exposed cosmic birthplaces. Stars take shape in clouds of gas and dust, and planets emerge in disks ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed ... monitoring Earth from space. NASA alone has dozens ...