Robert Horace Baker

Robert Horace Baker (born March 29, 1883 in Northampton, Massachusetts; died June 23, 1964 in Upland, California) was an astronomer.
Career.
Educated at Amherst College, he graduated with an A.B. in 1904 and A.M. the following year. His graduate work in astronomy was done at the University of Pittsburgh where he was an assistant at Allegheny Observatory and where he obtained the Ph.D. degree in 1910. Dr. Baker was also awarded an honorary D.Sc. by Oglethorpe University in 1936.
Dr. Baker’s first post was that of Assistant Professor at Brown University's Ladd Observatory (1910-1911) and he then became a Professor at the University of Missouri in 1911, a post he held until 1922. While there he used a visual photometer at Laws Observatory to study variable stars.
In 1922 he left Missouri, frustrated at an inability to obtain a more modern observatory. After a year as Kellogg Fellow at Lick Observatory in California, he was appointed Professor of Astronomy and Director of the University of Illinois Observatory in 1923. While at Lick, he used the photoelectric photometer on the 12-inch telescope to study u Herculis. He continued working on photoelectric photometry when he arrived at Illinois.
In 1931-1932 and again in 1938-39 he was a Research Associate of Harvard University while on sabbatical working with Bart Bok’s Star Count Circuit. Starting in 1939, he changed his research focus to the Milky Way and Galactic Structure.
Dr. Baker’s professional activities extended through many fields. His research publications run to more than forty articles in the areas of galactic structure, extragalactic nebulae cataloguing, variable star measurement, solar corona structure, and others. He was an exceptionally fine observer and possessed the added talent of clarity of style that made his articles models of scholarly writing. It is characteristic of his abiding interest in astronomy that he continued to publish research after becoming emeritus. His students include Elaine Nantkes, Lois Kiefer, David Heeschen, and Allan Sandage.
Author.
He enjoyed great success with his textbooks "Astronomy" and "An Introduction to Astronomy", both published by Van Nostrand, which have gone through many editions and numerous revisions. Reviewers invariably refer to them as “classics” and as the “standard by which other texts in astronomy are measured.” Otto Struve call "An Introduction to Astronomy" an excellent textbook that set a high standard. Dr. Baker took special pride in these books as indicated by the fact that he kept them up to date with periodic revisions even after retirement.
His very marked ability as an author served him well also in the field of popular astronomy. His books "The Universe Unfolding", "When the stars come out", "Introducing the Constellations", and "Stars: A Guide to the Heavens" (the last in collaboration with Herbert Zim) are known and esteemed the world over.
Among the professional societies in which he held membership are the American Astronomical Society, the American Association for the Advancement of Science, the American Physical Society, the Royal Astronomical Society, and Sigma Xi. Dr. Baker held this post until his retirement from the University of Illinois in 1951, having also been an Assistant Dean of the Graduate College in 1949-1951.
Family.
Robert Baker's parents were Horace Hall Baker and Ellen H. Puffer.
Robert married Rose Koenig of Goldendale, Washington, in 1911 in Ann Arbor, Michigan. They had two children, Ralph (born 1913) and Ruth (born 1914). Rose died in February 1925 of pneumonia.
He married Mary Howe in June 1926 and had one son, Robert Howe Baker, born 1927, died 1983. Mary Howe was the daughter of Louis McHenry Howe, secretary and advisor to President Franklin Roosevelt.