The scale of Mars’s moon Phobos
This astounding image made by Ludovic Celle shows Phobos, the largest moon of Mars (the other one being Deimos), imposed over the French city of Grenoble in the Alpes. Image credit: Ludovic Celle / davinci-marsdesign
Phobos’ dimensions are 26,8 x 18,4 km.
Image credit: Ludovic Celle / davinci-marsdesign
This satellite view picture, showing how Grenoble and Phobos compare.
Ludovic explains: “What better way to give a scale than to compare with actual things on Earth?
If you carefully look at the center of the picture, you’ll see 2 helicopters, still quite far from the “big rock”.
We can see there that the entire town of Grenoble would easily fit inside Stickney crater, Phobos’ largest crater (on the right).”
Image credit: Wikimedia Commons
With a mean radius of 11.1 km (6.9 mi), Phobos is 7.24 times as massive as the second moon Deimos. It is named after the Greek god Phobos (which means “fear”), a son of Ares (Mars). Both moons were discovered in 1877.
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