Meet OSIRIS-REx’s “Guide Boulders.” When the NASA spacecraft first arrived at asteroid Bennu over a year ago, the surface of the asteroid was much different than expected. Instead of a surface with large, smooth areas, nearly the entire surface is covered in boulders. That meant that NASA had to do a re-think of the sampling … Continue reading These are the Boulders OSIRIS-REx is Going to Use to Navigate Down to the Surface of Bennu