This week’s figure shows a close-up view of samples returned by the OSIRIS-REx spacecraft from asteroid Bennu. The authors identify salt minerals in the sample, which could also occur on many astrobiologically relevant bodies in the solar system, including Ceres and Enceladus. (1/2)

This week’s figure shows a km-scale mound in Mawrth Vallis, Mars. Variability in infrared spectral signatures with elevation are used to build a stratigraphic column, which suggests there was a region-wide succession of igneous material followed by extensive aqueous alteration.