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View Full Version : Strange Grooves on Phobos Were Caused by Boulders Rolling Around on its Surface



Fraser
2018-Nov-20, 11:40 PM
Back in the 1970s, NASA’s Mariner and Viking Missions were sent out to explore other planets in our Solar System. All three of them (there were two Viking missions) captured images of Mars’ moon Phobos during their travels. They were our first images of the tiny, potato-shaped moon, and the images held a mystery: strange …
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DaveC426913
2018-Nov-21, 01:59 AM
Interesting theory. But where are all the boulders now?
Shouldn't we see a statistically significant number of boulders at the ends of many grooves?