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Key terms: acceleration accessdate asaph hall asteroid astronomer been photographed capture crater deimos density equatorial exploration gravity grooves gulliver hollow hypothesis images mars mars express martian mimas moon moons of mars named after orbit phobos phobos and deimos phobos would pile planetary regolith rings rubble s travels secular shklovsky solar system spacecraft speculations stickney stickney crater surface surface of mars swift tidal tidal forces transits url viking Search external links cited by footnotes on Wikipedia page Phobos (moon): |
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