Time machine

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Across
  1. 5. The famous scientist that studied time
  2. 6. The fastest thing in the universe
  3. 8. The name of the first dimension
Down
  1. 1. Phenomenon where two people do not perceive that same motion for an object. Time _______
  2. 2. The scientist who hosted the reception for the time travelers
  3. 3. The first name of the main character from "Back to the future"
  4. 4. The Theory Einstein developed as a consequence of his study of time
  5. 7. The main concept of this presentation