PROFESSOR OF ASTRONOMY AT THE MASSACHUSETTS INSTITUTE OF
TECHNOLOGY; FELLOW OF THE AMERICAN ACADEMY OF ARTS AND
SCIENCES; MEMBRE DE LA SOCIÉTÉ ASTRONOMIQUE DE FRANCE;
MEMBER OF THE ASTRONOMICAL AND ASTROPHYSICAL SOCIETY
OF AMERICA; MITGLIED DER ASTRONOMISCHEN GESELLSCHAFT;
MEMBRE DE LA SOCIÉTÉ BELGE D’ASTRONOMIE; HONORARY
MEMBER OF THE SOCIEDAD ASTRONOMICA DE MEXICO;
JANSSEN MEDALIST OF THE SOCIÉTÉ ASTRONOMIQUE
DE FRANCE, 1904, FOR RESEARCHES ON MARS;
ETC., ETC.