Across
- 3. The totality of all space, time, matter, and energy that exists.
- 7. The scientific study of everything beyond Earth's atmosphere, including planets, stars, galaxies, and the universe's origin.
- 8. A theoretical physicist who revolutionized modern physics by developing the theories of special and general relativity.
- 10. The entire range of all possible frequencies, wavelengths, and photon energies of electromagnetic radiation, extending from low energy radio waves to high energy gamma rays.
- 14. The ability to do work, cause change, or move matter. measured in joules.
- 15. An instrument that breaks up a wave into a frequency spectrum.
- 17. A German-American radio astronomer and physicist.
- 18. An odorless and invisible element gas found on the periodic table of elements.
Down
- 1. Fundamentally changed our understanding of the universe by proving the existence of other galaxies and establishing that the universe is expanding.
- 2. Shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
- 4. The prevailing cosmological model explaining that the universe began about 13.8 billion years ago from an extremely hot, dense singularity.
- 5. The lightest, simplest, and most abundant chemical element.
- 6. The faint, nearly uniform, and isotropic electromagnetic radiation filling all space.
- 9. The segment of the electromagnetic spectrum, ranging from approximately 380 to 750 nanometers in wavelength.
- 11. A massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter.
- 12. A prominent British astrophysicist and cosmologist.
- 13. An American radio astronomer.
- 16. Occurs when light from a distant object is stretched towards longers, redder wavelengths, indicating it is moving away.