Japan’s MMX mission will reveal the origins of weird Martian moons

Although Phobos and Deimos may look like lumpy space potatoes, they’re actually moons of Mars. No one knows how they formed, but a newly launched spacecraft should soon offer answers

日本於10月19日發射MMX探測器，計划在火衛一著陸採樣並於2031年將樣品帶回地球。文章圍繞火衛一和火衛二的成因，梳理了俘獲小行星、撞擊濺射物質聚合等多種假說及其證據與疑點。