NASAのインスタグラム(nasagoddard) - 12月12日 04時53分

OSIRIS-REx is the first U.S. mission to collect a sample of an asteroid and return it to Earth for study. After a journey of several years, OSIRIS-REx is only months away from a sample collection attempt at the surface of asteroid Bennu. The OSIRIS-REx team has already pushed the boundaries of scientific exploration — going from ground-based radar images from Arecibo in Puerto Rico, all the way to orbiting a few hundred meters from Bennu. Before the sample collection attempt, let's look back at some of the major achievements, surprises and challenges of sampling an asteroid with OSIRIS-REx.

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