50274
Ammonia was first detected in interstellar space in 1968 , based on microwave emissions from the direction of the galactic core .
 astronomical object: galactic core
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: galactic core 
Answer:
 astronomical object: galactic core