80053
which forms when a white dwarf 's mass grows large enough to ignite carbon fusion in its center , touching off a runaway thermonuclear reaction , as may happen when a white dwarf in a binary star system strips gas away from the other star .
 white dwarf, binary star
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:
 white dwarf, binary star