Across
- 3. A material used to protect spacecraft from heat
- 5. A telescope with a segmented mirror
- 6. The process of a spacecraft entering Earth's atmosphere
- 8. A device to measure the speed of light
- 9. A type of rocket engine using high-speed exhaust
Down
- 1. A propulsion system using ionized gas
- 2. A method for reducing spacecraft weight in orbit
- 4. A system for tracking satellites and spacecraft
- 5. A device that converts solar energy into electricity
- 7. The first man-made object to leave Earth's gravity