Universe and waves

3. the barred a spiral galaxy that contains our Solar System, appearing from Earth as a bright band of stars stretching across the night sky
5. a rage of all EM waves organized by wavelength and frequency
6. a natural satellite that orbits a planet or smaller celestial body
7. an object spinning on its own axis that causes day and night
9. a giant, interstellar cloud of dust, hydrogen, helium, and other ionized gases
11. cancer treatment that uses gamma waves to kill cancer cells
13. a star and all the objects bound to it by gravity, including planets, moons, asteroids, and comets that orbit it
16. radiation energy caused by variations in electric and magnetic field intensity
17. a small, icy solar system body—often called a "dirty snowball"—composed of frozen gases, rock, and dust that orbits the Sun

1. systems of dust,gas stars and inersteller matter
2. a celestial body that orbits a star, is rounded by its own gravity, and has cleared its orbital neighborhood of other debris
4. a tide just after the quarter moons
6. a space rock (meteoroid) that burns up upon entering Earth's atmosphere, creating a bright streak of light
8. when a hemisphere tilts toward the sun, it experiences summer (more direct sun), and when it tilts away, it experiences
10. a type of wave in which the particles oscillate
12. a tide just after a new moon or a full moon
14. objects in space made of gas and produces its own light and heat
15. form Em radiation with long wavelengths and low energy