Across
- 2. an interstellar cloud of dust, hydrogen, helium and other ionized gases, that is used to form stars
- 5. a series of star types to which most stars belong, represented on a Hertzsprung–Russell diagram as a continuous band, that goes from left to right
- 6. a star that unexpictedley increases greatly in brightness because of a catastrophic explosion that ejects most of its mass
- 8. a region of space having a gravitational field so intense that no matter or radiation can escape.
- 9. Astronomers use the HR diagram to either summarise the evolution of stars, or to look at the properties of stars.
Down
- 1. a very large star of high luminosity and low surface temperature
- 3. a star that forms from the explosions of other stars
- 4. a reaction when two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles
- 5. refers to the size or extent of something
- 7. a contracting mass of gas that shows an early stage in the formation of a star, before nucleosynthesis has begun