117684
Discovery COROT-9b was discovered by combining observations from the CoRoT satellite , , which looks for a small dip in starlight as a planet passes in front of its parent star , and the ESO HARPS instrument .
 ESO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 ESO