Across
- 1. forms around the comets nucleus when close to the sun.
- 4. amount of light reflected by a celestial object.
- 6. a distant, beyond neptune disc.
- 8. comes close but only approaches earths orbit
- 9. a large spherical cloud around the orbits of the planets.
- 10. the farthest distance from the sun is called?
- 13. a scale used to measure magnitude of an earthquake.
- 14. method of determining a location using 3 seismograph stations
- 17. is the only known short-period comet.
- 21. a blanket of gases that surround the earth.
- 23. the closest distance from the sun is called?
- 24. the largest and spherical asteroid
- 25. a scale used to measure intensity of an earthquake.
- 27. the belief that earth was the center of the solar system.
- 28. meteor showers that come from asteroid 2003EH1.
- 30. short-term or day to day condition of the atmosphere.
- 31. a group of stars.
- 34. a model representing the sun as its center
- 35. the other planets that orbit the sun lie near the plane of earths orbit.
Down
- 2. when a meteor survives earths atmosphere.
- 3. is a long-period comet.
- 5. liquids that evaporate quickly
- 7. effect the sppining of earth on its axis produces the movement of air
- 11. is a break in the rocks that make up the earths crust.
- 12. celestial event when several meteors enter earths atmosphere.
- 15. cross but spend most of their time in earths orbit.
- 16. best known for his three laws of planetary motion.
- 18. also called miniature planets
- 19. -earthquake is the sudden shaking caused by tectonic plates.
- 20. used to measure air pressure
- 22. is the solid core of a comet.
- 24. composed of rock dust, ice, and some metal material.
- 26. called shooting or falling star.
- 29. where asteroids originate, lies between mars and jupiter.
- 32. imaginary elliptical line where the planets move around the sun.
- 33. this meteor shower happens every 75-76 years.