Here is the complete series of educational books in HyperCard format created by the Exploration in Education (ExInEd) program of the Special Studies Office at the Space Telescope Science Institute. Files retrieved from the legacy ExInEd website (www.stsci.edu/exined/), still online. HyperCard Player 2.1 included.
Content of the ZIP file:
Apollo 11 at Twenty-Five (apollo.sea.hqx)
Clementine Explores the Moon (clementine.sea.hqx)
Comparing Earth (comparing_earth.sea)
Endeavour Views the Earth (endeavour.sea.hqx)
Gems of Hubble 3.0 (gems.sea.hqx)
Images of Mars (mars.sea.hqx)
From the "PictureBook_Troubleshooting.txt" file:
"For Electronic PictureBooks to work correctly on your system, you must have the following:
1. HyperCard 2.1 or HyperCard Player 2.1 installed on your hard disk
2. A HyperCard memory partition of at least 2500K
3. An 8 bit (256 color) color or gray scale display
4. System 7.0 (or a later version)."
Tested successfully on:
Basilisk II for MacOSX w/System 7.5.5
SheepShaver for MacOSX w/MacOS 9.0.4