The New Horizons Long Range Reconnaissance Imager (LORRI) took this photo
of Jupiter at 20:42:01 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; the shadow of the icy moon
Ganymede moves across Jupiter's northern hemisphere.
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.
