Bennu and Ryugu look like spinning tops and scientists want to know why
Spacecraft visiting both asteroids may provide clues to the space rocks’ formation
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