Across
- 7. A model where the sun is the middle of the solar system
- 8. A very smart greek guy
- 11. the constellation that is big and dips
- 14. When the moon is all lit up
- 15. a group of stars recognizable and named after greek mythology
- 16. This is when a star explodes.
- 17. a cloud of gas and dust in outer space that makes a big light.
- 19. The different phases of the moon
- 21. The days where the daylight is long and the daylight is short
- 23. and Henry Norris Russell (1877–1957), in which the absolute magnitudes of stars are plotted against their spectral types. Stars are found to occupy only certain regions of such a diagram
- 29. When the moon gets blocked by the sun
- 30. Someone who studies space
- 31. A celestial object of very high density closely compact by neutrons.
- 33. is a large mass that forms from contraction out of gas.
- 35. When the sun gets blocked by the moon
- 36. a shiny celestial made of hot gas that fuses and produces light
- 37. A black dwarf is a white dwarf that has cooled down to the temperature of the cosmic microwave background, and so is invisible.
- 40. a small body of matter from outer space that enters the earth's atmosphere,
Down
- 1. The change in the frequency of a wave.
- 2. The rotation around its own axis
- 3. A model where the earth is the middle of the solar system
- 4. A formation of stars that are well known.
- 5. A star that lives up to 10 billion years.
- 6. a Tilt that changes where light hits the body
- 9. A scientific device that uses infared light to detect celestial bodies.
- 10. the partially shaded outer region of the shadow cast by an opaque object
- 12. The person who said that the Sun was the middle of the galaxy instead of earth
- 13. The random gas and particles that move in space.
- 18. A star that lives up to 7 years.
- 20. A small old relatively cool star
- 22. a meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground. More than 90 percent of meteorites are of rock, while the remainder consist wholly or partly of iron and nickel.
- 24. The process of joining two or more things together in one.
- 25. the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse
- 26. when a quarter of the moon is lit up
- 27. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
- 28. A star that lives up to 100 billion years.
- 32. the constellation that is major in Ursa
- 34. White dwarfs are stars that have burned up all of the hydrogen they once used as nuclear fuel
- 37. A hole with so much gravitational pull that not even light can escape
- 38. Known for his laws of planetary motion
- 39. A Italian Scientist.