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Moons around Jupiter
Release Date: January 23, 2007
The New Horizons Long Range Reconnaissance Imager (LORRI) took this photo of Jupiter and two of its moons at 19:42:01 UTC on January 9, 2007, when the spacecraft was 80 million kilometers (49.6 million miles) from the giant planet. The volcanic moon Io is to the left of the planet and the icy moon Ganymede is to the right.
Ganymede's average orbit distance from Jupiter is about 1 million kilometers (620,000 miles); Io's is 422,000 kilometers (262,000 miles). Both Io and Ganymede are larger than Earth's moon; Ganymede is larger than the planet Mercury.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute