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Scientists study Stickney Crater to solve Phobos origin mystery

Researchers presented new models at the European Geosciences Union general assembly in Vienna on September 19, 2026, regarding the giant Stickney Crater on Mars moon Phobos.

A giant crater may reveal the origin of Mars’ doomed moon
File photo A giant crater may reveal the origin of Mars’ doomed moon Photo: ScienceDaily

Crater reveals internal structure clues

The massive Stickney Crater measures nine kilometers across and spans five point six miles. Scientists believe this feature might contain a dense region of compressed material inside the moon. Examining these geophysical measurements helps determine if Phobos is a captured asteroid or impact debris.

Japan mission seeks physical proof

Japan plans to launch the MMX sample return mission soon to gather necessary data. This upcoming project aims to collect physical evidence needed to solve the long-standing mystery about Phobos history. The mission could provide measurements that clarify whether the moon formed from an ancient collision.

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