In article , DP wrote:
Apparently NASA seems to be sure enough that either no life
can exist within Jupiter, or that Galileo will be completely
sterilized before entering such "comfortable" atmospheric layers.

That issue goes back farther: the Galileo atmosphere probe was not
sterilized.
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MOST launched 1015 EDT 30 June, separated 1046, | Henry Spencer
first ground-station pass 1651, all nominal! |