QUOTE (Decepticon @ Jan 21 2006, 03:05 PM)
I found it odd that most astronomy books that I read never mentioned that they where imaged.
Here are some images from the book.http://history.nasa.gov/SP-349/ch6.htm
1. What hemispheres where imaged by the Pioneer's?
2. Has anyone used current moons maps to create what Pioneer could of imaged if it had better imaging capabilities?
3. If Pioneer 11 imaged IO what area could have been seen? (I understand Pioneer experience radiation exposure and caused a failed imaging attempted?)
4. Any why does Ganymede look so odd in the above link?(Figure 6-5)
Here are the "best" photos taken by the Pioneers of the Galilean moons.http://history.nasa.gov/SP-349/p180.htm
In Murmurs of Earth (1978), Carl Sagan speculated that Io may be covered in salts, as it did not display an ice signature like the other moons. One of the main Voyager team scientists also said just before the Voyager 1 flyby in 1979 that they hoped and assumed that Io would be the "Rosetta Stone" for understanding the Jovian system. They were rather surprised and disappointed at first when they didn't see any obvious craters. Then they got another surprise.
I can remember when the showed the images of Ganymede from Pioneer 10 in Sky & Telescope in 1974 and trying my darndest to discern anything recognizable from the images.