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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