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This video was assembled from a sequence of images taken by NASA's Perseverance rover with its Mastcam-Z camera on 2 April 2022. The object eclipsing (or, perhaps more accurately, transiting) the Sun's disk is Phobos, the larger of Mars' two potato moons.

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As a reminder, our Moon is about 400 times smaller, but about 400 times closer to us, than the Sun. This means the Moon's disk can almost perfectly obscure the Sun, giving us total eclipses. The Moon is slowly moving higher and farther away, so total solar eclipses will eventually be impossible.