Across
- 4. Stars are classified in groups based on this.
- 5. As a star changes, it does this on the H-R diagram.
- 6. This is the region above the main sequence.
- 7. The Morgan-Keenan system uses this type of numeral to classify stars.
Down
- 1. These are usually very hot stars that are below the main sequence.
- 2. The stages of a star's life cycle are governed but is size, energy production, and this.
- 3. A measure of temperature that is not Celsius or Fahrenheit.
- 5. This sequence is the most prominent feature on the diagram.