SMART-1 on the trail of the Moon’s beginnings

ever since the late 1960s/early 1970s, planetary scientists have been struck by the similarity of the moonrocks and the rocks found deep in the Earth. This boosted the theory that the Moon formed from debris left over after the Earth was struck a glancing blow by a Mars-sized planet.

Thanks to a large solar explosion and ESA SMART-1 observations, that might not be entirely the case.