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Internationally respected astronomer and renowned comet physics expert Michael Francis A’Hearn (1940–2017) passed away on 29 May 2017 at the age of 76.
Giovanni Fabrizio Bignami, ‘Nanni’ to his friends, suddenly passed away on 25 May 2017. A pioneer in the field of gamma-ray astrophysics, he identified Geminga: a mysterious, radio quiet, gamma-ray pulsar. He was an undisputed leader, manager, maestro, colleague and friend.
Charles Malcolm Walmsley passed away on 1 May 2017. He made numerous fundamental contributions to the physics and chemistry of star formation and the interstellar medium. He was an exceptional scientist, a highly esteemed colleague and a true gentleman.
A pioneer in the field of astrochemistry, Patrick Thaddeus discovered dozens of exotic molecules in space and helped revolutionize our view of the interstellar medium and star formation.
Neil Gehrels passed away on 6 February 2017. A pioneer of observational high-energy astrophysics, he was an exceptional leader, scholar, colleague and friend.
