Across
- 3. the name for a rock that burns up in Earth's atmosphere
- 4. a rock in space that orbits in a belt between Mars and Jupiter
- 6. HR graph plots stars by their luminosity (brightness) and _________
- 9. the type of constellations that lie along the ecliptic plane
- 13. the scientist who defined 3 laws of planetary motion
- 14. the name for a vast empty region in space
- 18. the middle layer of the Sun's atmosphere - appears a red/orange color
- 19. The phenomenon causes by the stretching of light wavelengths due to the doppler effect
- 20. a rock found just outside earth’s atmosphere - in space
- 23. constellation types that can be seen all year round
- 24. a dark region of the Sun caused by intense magnetic activity
- 25. a galaxy type that has a bright center with curved arms that spin outward
- 28. the astronomer who proposed the Heliocentric Model
- 31. a large celestial body that orbits a star
- 35. Solar ________ - bright flashes of light that appear on the Sun
- 37. the theory that the Sun is the center of the solar system
- 40. the name for galaxies that are grouped together
- 42. ________ classes - range from the extremely hot and bright O-type stars to the much cooler and dimmer M-type stars.
- 43. ________ relativity - the stronger the gravity, the slower time passes relative to someone farther away
- 45. the galaxy type with no clear shape/symmetry
- 48. the name for when the visible portion of the moon is shrinking each night
- 51. __________ zone - the interior middle layer of the Sun, densely rich in hydrogen
- 52. a vast cloud of gas and dust in space
- 53. the innermost layer of the Sun
- 57. the galaxy types that contain mostly old stars - round in shape
- 58. the angle between the Sun and the horizon, measured in degrees
- 59. the name for a massive collection of stars, gas, and dust held together by gravity.
- 60. the scientist who invented a more advanced form of the telescope made key observations to support the heliocentric model
Down
- 1. this scientist redefined the concept of gravity through his theory of general relativity
- 2. name for a planets motion as it orbits the sun
- 5. Nuclear _________ - the process in which the sun makes its energy
- 7. a rotating star map that can be adjusted to match the date and time
- 8. _____________ zone - the outermost interior layer of the Sun where hot gases rise toward the surface while cooler gases sink deeper into the interior
- 10. Constellations only visible during certain times of the year
- 11. Solar ________ - a continuous stream of charged particles flowing from the sun
- 12. the layer of the Sun's atmosphere that is the Sun's apparent "surface"
- 15. the Sun’s outermost atmospheric layer
- 16. The scientist who came up with the "Big Bang Theory"
- 17. Dark _________ - Provides the unseen gravitational “glue” that helps hold galaxies and clusters together
- 21. ___________ Relativity - time slows down for objects moving at speeds close to the speed of light.
- 22. the name for the star at the center of our solar system
- 26. a celestial object made up of mixtures of rock, ice, and dust - have very elliptical orbits
- 27. the "force" that causes objects with mass to attract one another
- 29. Law of _____________ - the law that states the further a planet is from the Sun, the longer it takes to orbit
- 30. Often found at the center of galaxies (write as one word)
- 32. Dark _________ - the repulsive force causing the expansion of the universe
- 33. a natural satellite that orbits a planet
- 34. the model that incorrectly stated the Earth was the center of the solar system
- 36. groups of stars that form recognizable patterns in the night sky
- 38. the name for a planet spinning on its own axis
- 39. an explosive event that occurs at then end of a large star's life
- 41. the second phase of a stars life where the star grows in size significantly (write one word)
- 44. when looking at constellations - the name for the point directly above you
- 46. the name for the path the Sun travels through the sky
- 47. the name for when the visible portion of the moon is growing each night
- 49. a rock from space that lands of the surface of a planet
- 50. the name for a planet with a solid surface (the first 4 in our solar system)
- 54. ______ planet - a planet too small to clear its orbit of debris
- 55. a precision instrument that measures the angle between a celestial object and the horizon—to determine their position
- 56. the fabric in which all objects exist, it contains the three dimensions of space with one dimension of time (write as one word)