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One of the best observed young supernova remnants was formed by SN 1987A , a supernova in the Large Magellanic Cloud that was observed in February 1987 .
 SN 1987A, Large Magellanic Cloud
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:
 SN 1987A, Large Magellanic Cloud