Across
- 3. waves with longer wavelengths than visible light.
- 4. transfer of energy through matter or space.
- 5. instrument that collects light or other electromagnetic radiaton
- 6. accurate representation of an object that is almost like the actual object
- 12. radiation consisting of electric and magnetic waves.
- 15. waves with very high energy and no mass or charge.
- 16. Galaxy with bulge in center with long arms.
- 17. equals 9.5 trillion km
Down
- 1. All space and matter in space.
- 2. explosion of a large star.
- 6. stars that spread from center of spiral galaxy
- 7. dust that appears as dark ribbons against bright stars
- 8. waves that are high energy used in medical.
- 9. 300,000km/sec
- 10. distance between two adjacent corresponding points.
- 11. grouping of stars in space.
- 13. galaxy with bright center with little dust or gas
- 14. Waves with long wavelengths and low frequencies.
- 17. waves that provide visible light spectrum.