CHICAGO -- A NASA spacecraft has intentionally slammed into an asteroid in humanity's first test of planetary defense. The impact occurred at 7:15 p.m. ET greeted by cheers from the mission team in ...

Add Yahoo as a preferred source to see more of our stories on Google. Such a collision could have devastating consequences for satellites and astronauts in space, prompting a group of scientists to ...

Scientists have spotted a small asteroid that may circle Earth as a mini moon before shifting onto a path that could make it a hazard later in the century. NASA has calculated the asteroid’s orbit and ...

Whether an asteroid is spinning neatly on its axis or tumbling chaotically, and how fast it is doing so, has been shown to be dependent on how frequently it has experienced collisions. The findings, ...