57221
The space probe " Voyager 1 " is moving in the direction of this constellation , though it will not be nearing any of the stars in this constellation for many thousands of years , by which time its power source will be long dead .
 Voyager 1
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:
 Voyager 1