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Allan Rex Sandage (1926-2010)

Allan Sandage was a prominent American astronomer. Born in Iowa City, Iowa, he is best known for determining the first reasonably accurate value for the Hubble constant and the age of the universe. He also discovered the first quasar.

Unfortunately, detailed, publicly accessible information about Allan Sandage's personal life, including social media presence (which would have been unlikely given his era) is scarce. Much of the information available focuses on his significant scientific contributions.

Key Projects and Discoveries

• Determining the Hubble Constant: Sandage dedicated much of his career to refining the Hubble constant, a value that describes the rate of expansion of the universe. He significantly improved the accuracy of this measurement, leading to more accurate estimations of the universe's age.
• Discovery of 3C 48 (Quasar): In 1960, Sandage identified 3C 48 as the first optically identified quasar, a discovery that revolutionized our understanding of active galactic nuclei.
• Stellar Evolution Studies: Sandage conducted extensive research on stellar evolution, mapping the life cycles of stars and contributing to our understanding of how they change over time.
• Observational Cosmology: He made crucial contributions to observational cosmology, using telescopes like the Hale Telescope at Palomar Observatory to gather data about distant galaxies and the expansion of the universe.

Further Information

More information about Allan Sandage and his work can be found through scholarly databases like the SAO/NASA Astrophysics Data System (ADS) and the Web of Science. Biographies and historical accounts of 20th-century astronomy often feature his contributions.

While a dedicated online presence maintained by Sandage himself or his estate does not appear to exist, information on his scientific publications and legacy is available within academic resources.

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