Stars

3. a very bright star of large diameter and low density (relative to the Sun)
6. small, old, relatively cool star; approximately 100 times the mass of Jupiter
9. an ordinary star such as the sun at a comparatively stable and long-lived stage of evolution
10. a celestial object intermediate in size between a giant planet and a small star, believed to emit mainly infrared radiation.
12. a celestial object of very small radius (typically 30 km) and very high density, composed predominantly of closely packed neutrons
13. A giant ball of hot gas

1. a very large star of high luminosity and low surface temperature
2. a star weighing the equivalent of at least ten Suns
4. the star round which the earth orbits
5. a star whose brightness changes, either irregularly or regularly.
7. among the most massive and most luminous stars
8. a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.
11. the star round which the earth orbits