Across
- 2. The model before the 1900’s that the universe was and always has been as we see it now.
- 3. Correctly predicted the wavelength of Cosmic Background Radiation decades before we could detect it.
- 5. The type of atoms (with electrons) that were first formed some 380,000 years after the Big Bang.
- 7. The time it took to form protons, neutrons and electrons after the Big Bang.
- 12. The idea that all galaxies began in one location and are receding from each other.
- 14. This doppler shift provides evidence that the universe is expanding.
- 15. Inaccurately included the “cosmological constant” to explain why the universe was not collapsing or expanding.
- 17. Discovered that the farther away objects are from us, the faster they move away from us.
- 20. We see this galaxy as it was 2.5 million years ago.
- 21. This is the most abundant element in the universe.
- 22. The study of the universe.
Down
- 1. About a quarter of the universe is composed of this, but we can’t see it because it gives off no light or other EM radiation.
- 4. The leftover energy/heat from the Big Bang is in this section of the EM spectrum.
- 6. The idea that the farther away something is, the longer in the past we see it.
- 8. The effect that gravity has on the light around it (how we know dark matter exists).
- 9. The time it took to form hydrogen and helium after the Big Bang.
- 10. These explosions created all the heavy elements that make up our planet & all the life on it.
- 11. The name for the one infinitesimally small point that contained all the “stuff” of the Big Bang.
- 13. The temperature (in Kelvin) of “empty” space.
- 16. A tested and verified explanation of a scientific aspect of the natural world.
- 18. This force is causing the expansion of the universe to accelerate.
- 19. The Big Bang doesn’t move galaxies, instead it stretches THIS - which makes the galaxies spread out.