Features:

  1. The image is a collage of the Galilean moons of Jupiter (i.e., the most prominent part of Jovian system) and a bit of Jupiter itself. It includes the limb of Jupiter with its Great Red Spot and Jupiter's 4 largest moons, the aforesaid the Galilean moons. The Galilean moons from top to bottom in the image (with diameter in kilometers and moon size order among the moons of the Solar System) are Io (3643 km, 4th), Europa (3122 km, 6th), Ganymede (5268 km, 1st), and Callisto (4821 km, 3rd).

  2. North is at the top of the image.

  3. Jupiter and the Galilean moons are all to-scale with scale factor 15 kilometers (9 miles) per pixel.

  4. "Note that Europa, the smallest of the Galilean moons, is slightly smaller than the Earth's Moon and Ganymede is the largest moon in the Solar System." (PIA00600: somewhat edited.)

  5. "The Great Red Spot, a storm in Jupiter's atmosphere, is perhaps ∼ 300 years old (see Wikipedia: Great Red Spot: Observational history). Winds blow counterclockwise around the Great Red Spot at ∼ 400 kilometers per hour (250 miles per hour). The storm is larger than 1 Earth diameter (equatorial value 12,756.2740 km) from north to south, and more than 2 Earth diameters from east and west. In this oblique view, the Great Red Spot appears longer in the north-south direction." (PIA00600: somewhat edited.)

  6. "The CCD camera aboard NASA's Galileo spacecraft (1989--1995-arrival--2003) obtained the Jupiter, Io, and Ganymede images in 1996 June, while the Europa images were obtained in 1996 September. Because the Galileo spacecraft focused on high-resolution imaging of regional areas on Callisto rather than global coverage, we use an image of Callisto from the 1979 March flyby of NASA's Voyager 1 spacecraft." (PIA00600: somewhat edited.)

  7. "Launched 1989 Oct18, the Galileo spacecraft's mission was to conduct detailed studies of the Jupiter, the largest Jovian moons, and the Jovian magnetosphere. The Jet Propulsion Laboratory (JPL), Pasadena, California, managed the mission for NASA's Office of Space Science, "Washington, DC." (PIA00600: somewhat edited.)

  8. "This image and other images and data received from the Galileo spacecraft are posted on the World Wide Web, on the Galileo mission home page." (PIA00600: somewhat edited.)