N ASA / GO D DA R D / U N I V E R S IT Y O F A R IZO N A Rugged Worlds NIGHTINGALE This 55-image mosaic shows the worn-looking crater on Bennu (center left) where OSIRIS-REX's primary sample site lies. The large boulder at center is about the size of a semi truck. s k y a n d t e l e s c o p e . o r g * M AY 2 0 2 0 15http://www.skyandtelescope.org