| Exploration Missions | Space Shuttles |
|---|---|
| Theme | Astronauts & Space Travel |
Check the listing for details. Space Shuttle Challenger Commemorative Plaque – Limited Edition. Condition: Used. Listed at 49.99 USD. Limited Edition commemorative plaque featuring a genuine microballoon (glass microsphere) produced in microgravity aboard the Space Shuttle Challenger during a NASA mission. These early microgravity experiments were part of NASA’s materials science program. Plaque number: CM 2296. Excellent vintage condition with minor wear consistent with age.