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Mars Will Become a Ringed Planet When Phobos Dies : Discovery News
Mars’ doomed moon Phobos may leave its parent planet a parting gift. A new study shows the moon is likely to break apart before it hits the atmosphere, creating a debris ring that will encircle Mars for millions of years. The research, published in this week’s Nature Geoscience, follows a report earlier this month that not only is Phobos losing altitude due to Mars’ gravity, it also already is showing signs of structural stress from tidal forces.