The Galactic Gauntlet

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Across
  1. 2. A massive system of stars, gas, and dust bound by gravity.
  2. 4. A rocky object orbiting the sun, smaller than a planet.
  3. 6. A streak of light from a space rock burning in Earth's atmosphere.
  4. 7. Relating to system of stars or the Milky Way.
Down
  1. 1. A cloud of gas and dust in space, often a stellar nursery.
  2. 3. Of or relating to the stars.
  3. 5. Tiny particles from stars, often used poetically.