Space

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Across
  1. 2. bodies that have a particular shape
  2. 3. bang theory- an explanation of the origin of the universe stating that it started small and expanded over billions of years
  3. 7. factor- a method of reducing all measurement by the same amount to achieve the proportions of the scale model
  4. 8. a celestial body moving in an elliptical orbit around a star
  5. 10. planet- a celestial body resembling a small planet by lacking certain technical criteria that are required for it to be classed as such
  6. 12. of relativity- the basic idea is that instead of being an invisible force that attracts objects to one another, gravity is a curving or warping of space. The more massive an object, the more it warps the space around it
  7. 15. The branch of science that studies the stars, planets, and other objects in space
  8. 16. an imaginary line that runs through the middle of an object around which that object rotates
  9. 20. system- a collection of eight planets and their moons in orbit around the sun, together in smaller bodies in form of asteroids, steroids, and comets
  10. 21. a celestial object consisting of nucules of ice and dust and, when near the sun, a tail of gas and dust particles pointing away from the sun
Down
  1. 1. model- Modern view of the universe that places the sun at the center and their planets and their moons revolve around the sun
  2. 4. A large system of dust, gas, stars, and other
  3. 5. main types of galaxies- most fall into one of three categories,
  4. 6. model- a description of the universe that placed the earth at the center and the sun, moon, stars, and all the planets revolve around the earth
  5. 7. a natural luminous body visible in the sky especially at night
  6. 9. year- the distance that light travels in one year
  7. 11. a natural satellite of the earth, visible by reflected light from the sun
  8. 13. elliptical or irregular
  9. 14. the total amount of matter in an object
  10. 17. a natural or artificial object that orbits another object in space
  11. 18. belt- a tours shaped region in the solar system, located roughly in between the orbits of the planets Jupiter and Mars, that is occupied by a great many solid, irregularly shaped bodies, of many sizes but match smaller than planets, called asteroid or minor planets
  12. 19. The curved path of an object such as a planet or moon around a central object, such as a star or a planet, to move in a circular or elliptical path around the object