First star I see tonight

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Across
  1. 3. A huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. Our Sun is in a spiral one called the Milky Way.
  2. 7. A natural satellite of a planet; an object that revolves around a planet.
  3. 8. A star, especially one that has planets and other celestial bodies revolving around it. Many other solar systems have multiple, while ours has just one.
  4. 9. An instrument that allows people to see distant objects. Are important tools in astronomy, or the study of planets, stars, and other objects in outer space.
  5. 10. Any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night
Down
  1. 1. A landform that rises significantly above the surrounding area. Has prominence, steep sides and significant height above sea level and the surrounding area.
  2. 2. A procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried
  3. 4. A printed or online publication that provides readers with news and articles.
  4. 5. One of the very small parts of matter (as a molecule, atom, or electron)
  5. 6. All of space and everything in it including stars, planets, galaxies, etc.