Amid the excitement for NASA's Discovery program announcement last week — which said that two new missions would fly by eight asteroids after launching in the 2020s — comes more difficult news for the ...

Earth is under no known threat of being struck by an object like that which is thought to have wiped out the dinosaurs, but collision with an asteroid of smaller size could do unthinkable damage of ...

As NASA looks to step up its detection of potentially dangerous Near Earth Objects (NEOs), it is working on a dedicated deep-space observatory first proposed more than a dozen years ago. NEOCam, ...