59903
The " solar constant " ( " G " ) is a flux density measuring mean solar electromagnetic radiation ( solar irradiance ) per unit area .
 astronomical object: solar
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: solar 
Answer:
 astronomical object: solar