in space

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Across
  1. 4. sometimes called minor planets, are rocky, airless
  2. 6. When meteoroid enter Earth’s atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called
  3. 7. a hot glowing ball of hydrogen and helium at the center of our solar system.
Down
  1. 1. big enough that its gravity cleared away any other objects of a similar size near its orbit around the Sun.
  2. 2. the title for those selected who make "space sailing" their career profession.
  3. 3. frozen leftovers from the formation of the solar system composed of dust, rock, and ices.
  4. 5. ball of gas, through which nuclear reactions take place and thus produce heat and light.
  5. 6. known as natural satellite