6th solar system

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Across
  1. 2. The universe is expanding and likely will _____
  2. 4. beyond Neptune’s orbit in our solar system
  3. 6. the ___ _____ of most stars are around 73% Hydrogen, 25 % Helium, 2%other
  4. 8. the sun has reactions called nuclear ____ that release heat and light
  5. 15. this space ship was the ones to carry astronauts to the moon
  6. 17. the inner layer of the sun
  7. 19. he, in 1920 discovered that galaxies are moving away from Earth and each other
  8. 21. spirit and ___ are the names of the 2 rovers sent to Mars in 2003
  9. 22. Russian to first orbit Earth
  10. 26. this is the motion of objects against background stars, it Helps determine distance
  11. 27. what the first formation of planets were called as rock and dust were brought together with gravity
  12. 29. the distance of stars is measured in ____ ____
  13. 31. a large cloud of gas and dust containing an immense volume of material
  14. 35. a craft that carries scientific instrumentation to gather info
  15. 37. the outer white glowing area of the sun’s atmosphere
  16. 39. the name of our galaxy
  17. 40. the inner layer of the sun’s atmosphere
  18. 41. how we measure distance in space
  19. 43. spinning neutron stars
  20. 44. flares gases/heat that erupt into space
  21. 45. huge loops of gases
  22. 46. this layer is the outer layer of the sun
  23. 47. these are used to determine the types of elements in stars
  24. 50. wind electrical particles coming off the sun
  25. 51. name of the re-usable rocket built in the 80s by the US
  26. 52. this zone is the middle layer of the sun
  27. 53. when a star starts to run out of fuel it glows from leftover fuel, it is called this
  28. 54. this may form from material leftover from a supernova- small but dense
  29. 56. when large stars run out of fuel, within hours it blazes a million times brighter – this explosion is called this
Down
  1. 1. these telescopes use mirrors to collect light
  2. 3. waaaay beyond Neptune in our solar system, beyond the Kuiper belt
  3. 5. the __ ___ ____ states that the universe formed in an instant in an enormous explosion
  4. 7. 99.85% of the mass of our solar system is the ____
  5. 8. scientists belive the universe came into being ___ billion years ago
  6. 9. the densest part of the nebula- a contracting nebula pulling in to form this
  7. 10. the hottest stars are this color
  8. 11. These are made up of millions of stars
  9. 12. these 2 probes 1 & 2 were sent in the 1970s to explore the outer planets
  10. 13. the name of the joint space station launched in the 90s
  11. 14. the ____ brightness of a star is the brightness it would have if it were a standard distance from Earth
  12. 16. dog launched into space by the Russian in the 1950s
  13. 18. the average distance from Earth to the sun is ___ AU
  14. 20. our sun will last approximately 5 ____ more years
  15. 23. ___ stars last longer than ___ ones
  16. 24. this lunar module landed on mars with 3 US astronauts
  17. 25. very large stars may only last 10 ____ years
  18. 28. area between Mars and Jupiter
  19. 30. Massive stars when they die can become this- after a supernova explosion
  20. 32. he, in the 1600’s found the true distance from Earth to the sun and Earth to Venus
  21. 33. these telescopes use many lenses
  22. 34. ice, dust, rock moving around the sun in a large orbit that originates in the Oort cloud
  23. 36. the first space station made in the 1970s
  24. 38. areas on the sun that are cooler
  25. 42. the middle layer of the sun’s atmosphere
  26. 48. the ____ brightness of a star is how bright is seems from Earth
  27. 49. a ___ planet is an object that orbits the sun but does not have its own clear path
  28. 55. the ___ of this indicates temperature of the star