Voyager 1 took this photo of Jupiter and two of its satellites (Io, left, and Europa) on Feb. 13, 1979. Io is about 220,000 miles above Jupiter's Great Red Spot; Europa is about 375,000 miles ...

Designed to take photos of the outer planets ... For instance, there’s a digital tape recorder still running on Voyager 1 that would reduce power consumption if it were turned off, says ...