Across
- 2. A plasma in hydrostatic equilibrium
- 7. State of matter, more energetic than gas
- 9. Westward motion relative to the stars
- 10. Human interpretation of wavelength of light
- 11. Charged particle of matter
- 12. Author of empirical model of planetary motion
- 13. Occurs when an electron returns to rest
- 15. Occurs to a photon when an atom is ionized
- 16. Smallest distinguishable size
- 17. Radiation from a hot, dense object
Down
- 1. Weakest fundamental force
- 3. Proponent of a heliocentric universe
- 4. Process of generating heavier atoms from lighter ones
- 5. Cycles per second
- 6. Low frequency part of the EM spectrum
- 8. Neutral particle of matter, defined by number of protons
- 14. State of matter, involved in first stage of core accretion
- 15. A change in speed and/or direction