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Here’s an intriguing video assembled by Daniel Macháček, made from archived image data from NASA’s Viking 1 orbiter; on September 28, 1977, over a year after dropping a probe onto the Martian surface, the orbiter captured images of the shadow of Mars’ moon Phobos passing over the billowy top of a dust storm. Daniel colorized these images and created the video above…nice work!
Viking 1 was the first of two missions to Mars in the program. Launched on August 20, 1975, it arrived at Mars in June of 1976 and successfully dropped a lander on July 20, which sent us back the first images ever taken of the Martian surface.
Read more about this video on Bad Astronomy.
Image Data: NASA/JPL. Processing: Daniel Macháček