Across
- 3. A small stellar and very dense core left behind from a dying star
- 6. A shift towards the longer or redder wavelengths of light rays coming from an object moving away from us
- 8. An instrument used to make far away objects appear much closer through the manipulation of light rays
- 9. A scientific law stating that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them
- 10. A system of space dust, gas, billions of stars and their solar systems, and other stellar objects held together by gravity
- 11. A unit of astronomical measurement equal to the distance light travels in one year
- 12. The collapsed core of a massive star that has run out of fuel
- 13. The study of everything in outer space beyond the atmosphere of the Earth
- 15. The process in which two atomic nuclei are fused together into a larger single nucleus
- 18. A massive and extremely bright explosion of a star
Down
- 1. Weak radiation waves traveling through everything in the universe
- 2. A classification of most stars able to be represented on a Hertzsprung-Russel diagram
- 4. The change in wave frequency during the relative motion between a wave source and its observer
- 5. A proposed theory of the universe's origin that states it started as a single extremely dense and hot point
- 7. The full range of radiation that travels throughout the universe that is measured in frequencies and wavelengths
- 14. A massive cloud of interstellar gas and dust in the space between separate stars
- 16. A branch of astronomy and physics dealing with the origin, evolution, and nature of the universe
- 17. A point or region of space with infinite density in which gravity is strong space time begins to distort severely