79714
There are two common routes to a " supernova " : either a massive star may run out of fuel , ceasing to generate fusion energy in its core , and collapsing inward under the force of its own gravity to form a neutron star or a black hole ; or a white dwarf star may accrete material from a companion star until it reaches a critical mass and undergoes a thermonuclear explosion .
 neutron star, white dwarf
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 neutron star, white dwarf