Across
- 3. no particles or even electromagnetic radiation such as light—can escape from it
- 6. are the smallest, coolest and dimmest Main Sequence stars and orange, red or brown in colour
- 10. is a powerful and luminous stellar explosion
- 12. is any star that is fusing hydrogen in its core and has a stable balance of outward pressure from core nuclear fusion and gravitational forces pushing inward
- 13. is a hot star with a luminosity class of III or II
- 14. a contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun
Down
- 1. is an interstellar cloud of dust, hydrogen, helium and other ionized gases
- 2. a small very dense star that is typically the size of a planet
- 4. go through a similar process to low mass stars in the beginning, except that it all happens much faster
- 5. is the collapsed core of a giant star which before collapse had a total mass of between 10 and 29 solar masses
- 7. are among the most massive and most luminous stars
- 8. Stars are born within the clouds of dust and scattered throughout most galaxies
- 9. is the combining together of two lighter nuclei to form a heavier one
- 11. is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently that it no longer emits significant heat or light
- 15. is a dying star in the last stages of stellar evolution