Allan R. 1926年6月18日至2010年11月13日，桑德奇
Allan R. Sandage, 18 June 1926 - 13 November 2010
摘要：
艾伦·桑德奇是一位观测天文学家，他最喜欢用望远镜。在哈勃突然去世后，艾伦·桑德奇继承了在帕洛玛使用世界上最大的光学望远镜来确定星系的距离和数量的计划。多年来，他大大修改了距离尺度，并在重新工作哈勃的分析，发现了错误，导致哈勃怀疑解释星系的红移作为宇宙的膨胀。Sandage表明，恒星、元素和宇宙的创造年龄是一致的。通过与巴德和史瓦西的合作，他发现了用恒星演化解释星团颜色星等图的关键。他与其他人一起创立了银河考古学，根据银河系形成的模型解释最古老恒星的运动和元素丰度。他出版了几本精美的星系地图集和星表，以及威尔逊山天文台的权威历史。
英文摘要：
Allan Sandage was an observational astronomer who was happiest at a telescope. On Hubble's sudden death Allan Sandage inherited the programmes using the world's largest optical telescope at Palomar to determine the distances and number counts of galaxies. Over many years he greatly revised the distance scale and, on re-working Hubble's analysis, discovered the error that had led Hubble to doubt the interpretation of the galaxies' redshifts as an expansion of the universe. Sandage showed that there was a consistent age of Creation for the stars, the elements, and the Cosmos. Through work with Baade and Schwarzschild he discovered the key to the interpretation of the colour-magnitude diagrams of star clusters in terms of stellar evolution. With others he founded Galactic Archaeology, interpreting the motions and elemental abundances of the oldest stars in terms of a model for the Galaxy's formation. He published several fine atlasses and catalogues of galaxies and a definitive history of the Mount Wilson Observatory.
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