• Eunice OMWOYO (Vitória, Brasil) 
Eunice OMWOYO
Universidade Federal Do Espírito Santo
Vitória, Brasil
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• Anca Stefania ORIAN (, )
Anca Stefania ORIAN
,
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• Tomas ORTIN (Madrid, Spain)
Tomas ORTIN
IFT-UAM/CSIC
Madrid, Spain
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• Per OSLAND (Bergen, Norway)
Per OSLAND
University of Bergen
Bergen, Norway
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• Aleksandar OTAšEVIć (Belgrade, Serbia)
Aleksandar OTAšEVIć
Astronomical Society "Rudjer Boskovic"
Belgrade, Serbia
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