SPINNING TOP Both Bennu (left) and Ryugu (right) have a diamond shape that is common for asteroids of their size, but scientists can’t yet explain how the shape forms.
From left: GSFC/NASA, Univ. of Arizona; JAXA, Univ. of Tokyo, Kochi Univ., Rikkyo Univ., Nagoya Univ., Chiba Institute of Technology, Meiji Univ., Univ. of Aizu, AIST