4491
When hydrogen fusion in its core has diminished to the point at which the Sun is no longer in hydrostatic equilibrium , its core will undergo a marked increase in density and temperature while its outer layers expand , eventually transforming the Sun into a red giant .
 astronomical object: red giant
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 astronomical object: red giant