Across
- 4. a force which attracts all objects towards each other
- 5. the part of space that exists between stars.
- 7. National Aeronautics and Space Administration
- 8. a region of space having a gravitational field so intense that no matter or radiation can escape
- 9. a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft
Down
- 1. the concept of movement between certain points in time
- 2. a vehicle or machine designed to fly in outer space
- 3. a tunnel with two ends, each at separate points in spacetime
- 6. a system of stars and planets