NASA has posted an image of its new solar-electric propulsion thruster, which uses xenon ions for propulsion. The engine in the photo, blue with the

A comet blazing toward Earth could outshine the full moon when it passes by at the end of next year – if it survives its

While long anticipated in both science and science fiction, the existence of a circumbinary planet — a planet orbiting two stars — like “Tatooine” portrayed