The factor that determines how long a star lives is its mass. The stages of a star are: white dwarf is the cooled core of a star that has run out of fuel, planetary nebula is a cloud of gas formed from the expanding outer layer of a red giant, supernova is the explosion of a high-mass star, neutron star is the small dense remains of a high-mass star that is called a pulsar when it spins, and black hole is an object whose gravity is so strong nothing can escape it.

2. Brightness

3. Volume

4. Temperature2. Match each stage of a star with its definition ____ White dwarf ___ Planetary Nebula ___ Supernova ___ Neutron Star ___ Black Hole A. the small dense remains of a high-mass star that is called a pulsar when it spins B. Explosion of a high-mass star C. An object whose gravity is so strong nothing can escape it D. A cloud of gas formed from the expanding outer layer of a red giant E. The cooled core of a star that has run out of fuel