QUESTION: 
What material was the parachute that slowed the Jupiter Probe from over 
100,000 mph to around 100 mph made out of ?

ANSWER: from Charlie Sobeck on January 5, 1996:
The probe enters Jupiter's atmosphere traveling at approximately 
170,000 kilometers/hr (106,000 mph).  Initially, the Probe is slowed by 
the density of the atmosphere, much as a stone is slowed by water if it is 
dropped into a pool.  Within a minute and a half, the Probe is slowed to 
only 3,200 km/hr (2,000 mph), subjecting the probe to a force up to 230 
times earth's gravity and the parachute deployment begins.

From there, the parachute slows the Probe down even further, to less 
than 650 km/hr (400 mph) about 2 minutes later.  Hanging from the 
parachute, the Probe continues to fall slower and slower as the atmosphere 
gets thicker.

The canopy and shroud lines of the main parachute were made of 
Dacron; the riser was made of Kevlar.  The parachute was 8.2 feet in 
diameter.