Across
6. _____ was the teacher killed in the Challenger explosion.
8. Venus is the _____ planet from the Sun.
9. Sally Ride is an _____.
10. _____ is the hottest planet.
11. Neil Armstrong was the first man on the _____.
Down
1. The _____ blew up in 1986.
2. When the life of a star ends, a _____ sometimes happens.
3. SkyLab is a _____.
4. Galileo improved the _____.
5. The Space Shuttle is the first _____ space craft.
7. The _____ Space Station will have over 100 modules.

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