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Filtering by: Donald Osterbrock, recipient of the 1997 Gold Medal of the Royal Astronomical Society, at a celebratory dinner at University House: Chancellor Greenwood with Donald and Irene Osterbrock Remove constraint Donald Osterbrock, recipient of the 1997 Gold Medal of the Royal Astronomical Society, at a celebratory dinner at University House: Chancellor Greenwood with Donald and Irene Osterbrock

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