Formation of the solar system

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Across
  1. 4. - Within the cooler parts of the disk, dust particles collided and stuck together, forming larger clumps. Because of this the formation of Proto-planets officially started.
  2. 5. law of Universal gravitation - Newton's universal law of gravitation states that every particle in the universe attracts every other particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
  3. 6. - As the nebula shrinks, it spins faster, creating a flat, disk-like structure.
Down
  1. 1. - A massive, cold cloud of interstellar gas and dust begins to collapse under its own gravity.
  2. 2. - As it flattened the momentum created a hot and dense enough core to start the nuclear fusion officially turning it into a star.
  3. 3. hypothesis - A scientific theory which theorized the formation of the solar system