Callisto the Satellite of Jupiter Essay -- Astronomy

Its easy to see wherefore non much attention is paid to Callisto. For four hundred years,Callisto appeared only when as the fourth dot away when gazing at Jupiter through a telescope. It alsodidnt help Callisto gain attention by orbiting Jupiter. Jupiter whitethorn be one of the most intriguingobjects that astronomers have yet to study. Jupiter is the top executive of the artificial satellites. With its complex caboodles and zones, Great Red Spot, and sheer size, Jupiter has captured our imaginations and haspushed us to learn and look for all we can about it. Now, with our Pioneer, Voyager, andespecially Galileo spacecrafts, we have uncovered mysteries of Callisto that kick downstairs our minds andimaginations quite a workout.John D. Anderson used Radio Doppler entropy accumulate by the Deep shoes Network fromfive encounters of the Galileo spacecraft with Callisto. From this data him and his team foundthat Callisto has a mean radius of 2410.3 km, with no perceptible deviati on from sphericity. Theyassembled this data measuring deuce-ace principle axes, and all three axes were equal to the meanradius with a realistic error of 1.5 km (Anderson et al., 2001). This places Callisto as the thirdlargest satellite in the Solar System, slightly little than Mercury, but 1330 km in radius largerthan Pluto.Callisto does have an atmosphere. This is not comparable to the atmosphere of Titan orany other planet with a significant atmosphere. Nonetheless, an off-limb scan of Callisto wasconducted by the Galileo near-infrared mapping spectrometer in hopes to detect a carbon dioxideatmosphere. Airglow in the 4.26 m carbon dioxide band was indeed observed up to 100 kmabove the surface. This indicates the straw man of a tenuous carbon dioxide atmosphere withsurface pressure o... ...820 - 821.Dutch, Steven. volcanic crater Forms. Natural and Applied Sciences. 10 05. 1999. University ofWisconsin. 07 12. 2005 .Kivelson, M. G. et al. (1999). Journal of Geophysical Research - Space Science, 104, A3, 4609-4625Moore J., and Malin M. (1988). Geophys. Res. Lett., 5, 225.Schenk P. (1993). Journal ofGeophysics Research, 98, 7475.Spudis, Paul. The Geology of Multi-Ring Impact Basins. New York Cambridge UniversityPress, 1993.Thomas, C. and Ghail, R.C.. The Internal Structure of Callisto. Lunar and sublunar Science2002 1196-1197.Thorarinsson, S. (1957) The Jkulhlaup from the Katla area in 1955 compared with otherJkulhlaups in Iceland. Jkull 7, 21-25Wagner, R., Wolf, U, and Neukum, G.. Crater Size Distribution on Callisto. Lunar and peregrine Science 2004 1964-1965.