Across
- 3. stars which brighten and dim periodically
- 5. an effect that is associated with any wave phenomena
- 7. unit of thermodynamic temperature
- 9. Segue 2 is the smallest?
- 10. Alpha Centauri largest known?
- 11. the physical interaction among electric charges, magnetic moments, and the electromagnetic field.
- 12. if heat is recognized as a form of energy, then the total energy of a system plus its surroundings is conserved
- 13. the radiation era in the Big Bang theory
Down
- 1. produced by transitions of electrons within atoms or ions
- 2. a powerful and efficient fuel for interstellar travel or travel between stars
- 3. brings together the natural sciences, particularly astronomy and physics
- 4. a water molecule (H2O) is a
- 5. does not interact with the electromagnetic force
- 6. refers to a place in the universe where our laws of physics simply break down
- 8. ton 618 famous?