Solar System

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Across
  1. 3. distant regions contain thousands of icy objects including thousands of dwarf planets such as Pluto
  2. 4. made up of relatively small rocky planets with smaller orbits, shorter year lengths and solid surfaces
  3. 7. any star together with the group of celestial bodies that are held by its attraction and revolve around it
  4. 8. process of deliberately modifying the atmosphere, temperature, surface topography or ecology of a planet
Down
  1. 1. between the Inner and Outer planets is an area filled with millions of asteroids, meteoroids and other space debris
  2. 2. an area of their solar system that could support life
  3. 5. up of larger gaseous planets
  4. 6. Any planet orbiting around a distant star