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Jupiter 2006 Imke de Pater, Michael Wong (UC Berkeley); Al Conrad (Keck Observatory), and Chris Go (Cebu, RP) A false-color composite near-infrared image of Jupiter and its moon Io, taken July 20 Hawaii time (July 21 UT) by the Keck II telescope on Mauna Kea using adaptive optics (AO) to sharpen the image.

Tvashtar Montage (NASA New Horizons Jupiter Encounter Image) An HST image of Io and the Tvashtar plume seen against Jupiter; sulfur gas in the plume absorbs ultraviolet light, making the plume look reddish in this color composite.

ULYSSES AT JUPITER, To reach its final polar orbit around the Sun, chosen in order to chart the heliosphere at all solar latitudes, Ulysses needed a gravitational pull from Jupiter.

This beautiful image of the crescents of volcanic Io and more sedate Europa is a combination of two New Horizons images taken March 2, 2007, about two days after New Horizons made its closest approach to Jupiter.

Tuesday, March 6, 2012: Amateur astronomer Damian Peach obtained this image of Jupiter with its moons Io and Ganymede on Sept. 12, 2010, when Jupiter was close to opposition. South is up. The "Great Red Spot" is visible in the image. Skywatchers have a great opportunity to see Jupiter and Venus close together now, moving to their closest positions March 12-13, 2012. (Credit: NASA/Damian Peach)