A giant crater may reveal the origin of Mars’ doomed moon
A massive crater on Mars’ moon Phobos may hide a dense region of compressed material that could reveal whether the moon is a captured asteroid or debris from an ancient impact on Mars. Japan’s upcoming MMX sample return mission could provide the measurements and physical evidence needed to solve the mystery.
原文：https://www.a8q9.cn/en/article/a-giant-crater-may-reveal-the-origin-of-mars-doomed-moon-89f4e8.html