Asteroid Bennu is much stranger than researchers previously thought.
a fragment of an asteroid, a space rock called Itokawa. A few years earlier, Hayabusa, had mapped the whole of Itokawa, revealing a landscape strewn with boulders but also featuring smooth beach-like plains, or ponds, of gravel and sand. . But as it turned out, despite some superficial resemblance, the asteroid that OSIRIS-REx was to head for turned out to be completely different.
Stereoscopic imaging replicates the ability of human eyes to perceive surrounding space in three dimensions. Dedicated stereo cameras help Martian rovers navigate their exploration site. But the OSIRIS-REx spacecraft wasn't fitted with a stereo camera. May, however, knew his way around this issue by selecting images of various spots on Bennu taken from different angles and processing them for 3D viewing.
With May's help, the OSIRIS-REx team eventually identified a sufficiently obstacle-free crater to attempt the sample collection. Still, the team had to remotely reprogram the spacecraft to accomplish the feat. Instead of the originally envisioned 164-foot-wide landing side, the van-sized spacecraft had to squeeze into the merely 33-foot-wide Nightingale Crater.
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