This image shows the target touchdown spot for OSIRIS-Rex, a spacecraft that has been flying along with the asteroid Bennu for almost two years. The craft (shown to scale) will descend toward the asteroid on October 20, then fire a burst of gas to stir up dust and pebbles. It will collect a few ounces of the material, then back away. It will leave the asteroid early year and return the samples to Earth in 2023 for analysis. [NASA/GSFC/Univ. Arizona]