Across
- 4. the amount of time it takes the Earth to complete a revolution around the sun 365.25 days
- 6. structures contains telescope and a utilitary instruments with which to observe space
- 7. a space vehicle that is shaped like a long tube
- 9. a space instrument with no people that is used for research
- 10. variable whose variation doesn't depend on that of another
- 11. a type of telescope that uses mirrors to capture light
- 12. anything that is held constant or liited in a research study
- 13. the amount of time it takes the earth to rotate once on its axis every 24 hours
- 14. changes in weather cause by the Earth's tilt towards away from the sun
Down
- 1. an object that orbits a planet or a star
- 2. the process of the moons revolution around the Earth
- 3. The elliptical path of a celestial object around a star, planet, or moon
- 5. a telescope that uses lenses to capture light
- 7. a type of telescope that uses radioworks from space to find the position of celestial objects
- 8. something that you can depend on