Across
- 4. Chain of thermonuclear reactions that is the chief source of the energy radiated by the Sun and other cool main-sequence stars.
- 6. A region of cosmic gas and dust formed from the cast-off outer layers of a dying star.
- 7. The Pauli exclusion principle states that no two electrons with the same spin can occupy the same energy state in the same volume.
- 11. At a star's core, outward pressure is generated by thermonuclear fusion between hydrogen atoms to form helium.
- 13. The pressure on a surface resulting from electromagnetic radiation that impinges on it, which results from the momentum carried by that radiation.
- 14. Sequence of thermonuclear reactions that provides most of the energy radiated by the hotter stars.
Down
- 1. Large volumes of gas and dust in space, which can evolve from diffuse clouds to denser dark clouds.
- 2. A state of balance between gravity, which wants to pull things together, and pressure, which wants to blow it apart.
- 3. The process by which elements are formed within stars as they evolve.
- 5. Extremely dense pockets of matter, objects of such incredible mass and miniscule volume that they drastically warp the fabric of space-time.
- 8. A quantum mechanical phenomenon that arises from the Pauli exclusion principle.
- 9. Young stars within the earliest phase of stellar evolution.
- 10. A sudden onset of nuclear fusion of helium into carbon in the core of a low-mass star.
- 12. Dramatic explosions that take place during the final stages of the death of a supermassive star.