Timeline Callisto

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A moon of Jupiter. The oldest, outermost and least geologically active.
    (SFC, 11/6/96, p.B8)

1979        The spacecraft Voyager took pictures of Ganymede and Callisto.
    (SFC, 7/11/96, p.C1)

1995        The space orbiter Galileo reached Jupiter and sent down a probe. Jupiter has 16 moons: 1) Callisto has ancient craters. 2) Europa has a smooth icy sur-face that may hide water. 3) Ganymede is grooved by huge parallel valleys 4) Io has erupting volcanoes.
    (WSJ, 12/7/95, p.A-11A)

1996        Nov 4, The Galileo spacecraft passed within 686 miles of Callisto. Callisto has a diameter of 2,986 miles. Ganymede is 3,269.
    (SFC, 11/5/96, p.A4)

1996        Dec 19, The Galileo will fly within 435 miles of Callisto.
    (SFC, 11/6/96, p.B8)

1997        Oct 10, It was reported that Galileo detected complex organic molecules on Callisto and Ganymede.
    (SFC, 10/10/97, p.A4)

1997        The Galileo spacecraft indicated an atmosphere of hydrogen and carbon dioxide around Callisto. Metallic cores inside Io, Ganymede and Europa and the lack of a similar core inside Callisto was also indicated.
    (SFC,12/17/97, p.A4)

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