Dark Energy crossword

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Across
  1. 1. Massive "islands" in space made of stars, gas, and dust held together by gravity.
  2. 6. The systematic investigation into a subject to discover new facts or theories.
  3. 8. The capacity to do work or cause change; in deep space, it's often "dark."
  4. 9. A state of being contrary or acting against; in astronomy, it's when a planet is on the opposite side of Earth from the Sun.
  5. 11. Reaching a conclusion based on evidence and reasoning rather than direct observation.
  6. 12. To discover or identify the presence of something using specialized equipment.
Down
  1. 2. Describing a universe that stays the same size and doesn't change over time (a theory later proven wrong).
  2. 3. A synonymous term for the universe, often implying a sense of order or beauty.
  3. 4. The invisible pull that keeps your feet on the ground and planets in their orbits.Expansion Massive "islands" in space made of stars, gas, and dust held together by gravity.
  4. 5. The whole of all space, time, matter, and energy.
  5. 7. The ongoing "stretching" of the fabric of space.
  6. 10. The "stuff" that everything is made of, possessing mass and taking up space.