Across
- 4. the most basic unit of time
- 5. each season begins with an________or solstice
- 6. most of our units of time are based upon the motion of the_______
- 8. this type of telescope uses mirrors instead of lenses
- 9. this technique uses computer-controlled mirrors that constantly flex and bend to correct for atmospheric distortion
- 11. white light is actually made of combined colors of the rainbow
- 12. this calendar is based on the length of a solar year
- 14. who developed the first reflecting telescope
- 16. level of detail
- 17. the____year is the time it takes the earth to orbit the sun once
Down
- 1. the most important instrument used by astronomers
- 2. this type of telescope studies radio waves
- 3. a ______month is a little longer than 29 ½ days
- 7. a device that splits light into a spectrum for analysis
- 10. these are needed to divide time into years and months
- 12. the nation of Israel uses this calendar
- 13. this space telescope can “see” without any atmospheric distortion
- 15. the________is not based on a heavenly body
- 16. this type of telescope uses lenses instead of mirrors