检查点：OSIRIS-REx练习样本收集
This image shows sample site Nightingale Crater, OSIRIS-REx’s primary sample collection site on asteroid Bennu. The image is overlaid with a graphic of the OSIRIS-REx spacecraft to illustrate the scale of the site. In August, the robotic spacecraft will make NASA’s first-ever attempt to descend to the surface of an asteroid, collect a sample and ultimately b...