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He was at his home observatory just outside Murrumbateman , New South Wales , Australia , using stacked images on a diameter reflecting telescope equipped with a low light machine vision video camera attached to the telescope .
 Murrumbateman, New South Wales, Australia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Murrumbateman, New South Wales, Australia