Jupiter as seen by Voyager 1 probe with a special filter.
Once per Jovian day, which is approximately 10 hours, during early 1979, Voyager 1 transmitted images of Jupiter. These pictures were taken from January 6th to February 3rd. Also, Voyager 1 flew from a distance of 58 million kilometers (36 million miles) from Jupiter, to a closer distance of 31 million kilometers (a little over 19 million miles), as the picture shows movement from a farther distance to a closer approach. The small, round, dark spots appearing in some frames are the shadows cast by Jupiter's moons, which pass between Jupiter and the Sun.