Across
- 2. A model explaining that the universe expanded from an extremely hot and dense singularity.
- 5. A colorless, odorless, tasteless, and inert noble gas with atomic number 2, It was one of the first elements created after the big bang.
- 9. The scientific study of everything outside Earth's atmosphere.
- 12. The entire range of a
- 13. The displacement of electromagnetic radiation (such as light) towards longer, redder wavelengths as a celestial object moves away from the observer.
- 14. An instrument that separates incoming radiation (such as light or sound) into its component wavelengths and records this data to a detector.
- 16. The capacity to do work and produce change.
- 17. A pioneering American astronomer who revolutionized cosmology by proving the existence of other galaxies and that the universe is expanding there is also a telescope named after him.
- 18. The massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter.
Down
- 1. The faint, uniform remnant radiation left over from the Big Bang
- 3. The narrow band of light that the human eye can see.
- 4. A German-American physicist and radio astronomer who co-discovered cosmic microwave background (CMB) radiation.
- 6. A renowned American avant-garde director, playwright, and designer.
- 7. A German-born theoretical physicist who developed the Theory of relativity.
- 8. The lightest and most abundant chemical element (atomic number 1) Another of the first elements created after the big bang.
- 10. The decrease in wavelength of light emitted by a celestial object moving toward an observer.
- 11. the totality of all space, time, matter, and energy, encompassing everything that exists.
- 15. A prominent British astrophysicist and cosmologist known for developing the theory of stellar nucleosynthesis.