Here’s one of the latest of thousands of photos from the Hubble Space Telescope.
That’s the moon Ganymede in its orbit going behind Jupiter. Ganymede is the largest of the moons orbiting not only Jupiter, but the largest moon in the solar system. It is slightly larger than Mercury with a diameter of 3,270 miles, (Mercury is 3,032 miles). That means if it were in orbit around the sun, it would be classified as a planet. It also gives the scale of the size of Jupiter. Ganymede is approximately 40% the size of Earth. If you look closely at the Great Red Spot on Jupiter, which is a gigantic storm that’s been raging for centuries, Earth would easily fit inside with plenty of room to spare.
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