Across
- 5. space and all the matter and energy in it
- 7. magnitude-a measure of how bright a star would be if seen from a standard distance
- 8. Diagram-Hertzsprung-Russel Diagram
- 9. star-a star that has collapsed under gravity
- 12. of the frequencies or wavelengths or electromagnetic radiation
Down
- 1. magnitude-the brightness of a star as see from earth
- 2. gigantic explosion in which a massive star collapses
- 3. year-the distance that traveled in a year
- 4. large cloud of gas and dust in interstellar space
- 6. the actual brightness of an object such as a star
- 10. dwarf-a small hot dim star that is left over
- 11. a collection of stars, dust and gas bound together by gravity