Origins of the Universe

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Across
  1. 3. A collection of non-stellar celestial bodies—planets, moons, asteroids, comets, and dust—orbiting a star or stellar remnant.
  2. 5. A celestial body that orbits a Sun(rather than a moon), is massive enough to be nearly round (spherical) due to its own gravity.
  3. 6. Any physical substance that possesses mass and occupies space (has volume), making up all tangible objects in the universe.
  4. 8. The study of the origin of properties, processes, and evolution of the universe.
Down
  1. 1. The entirety of all space, time, matter, and energy in existence, encompassing planets, stars, galaxies, and the contents of intergalactic space.
  2. 2. A scientist who studies the universe, including planets, stars, galaxies, and black holes, to understand how celestial bodies form, function, and evolve.
  3. 4. The theory that states that the universe began with a tremendous explosion 13.7 billion years ago.
  4. 7. A massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter.