Mars periodically witnesses moments when its moons cast a shadow on its surface, as happens on Earth, but the “eclipse” on the surface of the Red Planet is very different from what we see on our planet.
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While the Earth’s moon takes 27 days to complete its cycle, Phobos orbits Mars once every 7.65 hours, while the Deimos cycle takes 30.35 hours, and between these two moons, Phobos has a larger size, blocking up to 40%
of sunlight, while Deimos blocks out a much smaller percentage.
NASA’s Rovers, Opportunity, and Curiosity have captured videos of the moment the sun is blocked out, as it appears on the surface of Mars.
These events are not considered eclipses as we witness on planet Earth, from a scientific point of view, because they are transits that do not completely block sunlight.