Across
- 2. Unmanned satellites or remote-controlled “landers”
- 4. Forms of radiated energy that travel at the speed of light
- 6. The angle between the most northerly point of the horizon and the point directly below a celestial body; also the horizontal angle or direction of a compass bearing
- 7. A big change in the frequency of sound, light, and other waves
- 9. The entire range of wavelengths for electromagnetic energy
- 10. The gasses and dust that exist in the space between the stars
- 11. The force of attraction between masses
Down
- 1. The distance that light travels in 1 year (approximately 9.5 trillion km); used to measure distance between stars and galaxies.
- 3. A telescope system that collects and analyzes radiation in the radio frequency
- 5. The condition in which the gravitational forces that act on a mass are greatly reduced
- 8. Using 2 or more telescopes to take a combined picture with a higher resolution than a singular telescope