(Excerpt from Observations of Double Stars Made at the Uni...)
Excerpt from Observations of Double Stars Made at the United States Naval Observatory I have therefore collected and revised all my observations of double stars, and the results are given in the following pages. In order to make this collection com pleta I have included the few observations made in the year 186 3 with the equatorial of inches aperture. The whole number of observations is 1614. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Hall was born on October 15, 1829 in Goshen, Connecticut, the son of Asaph Hall II (1800–42), a clockmaker, and Hannah Palmer (1804–80). His paternal grandfather Asaph Hall I (June 11, 1735 – Mar. 29, 1800) was a Revolutionary War officer and Connecticut state legislator. His father died when he was 13, leaving the family in financial difficulty.
He attended the district schools until he was 13. At 16 he was apprenticed to a carpenter, and he worked at that trade sporadically. His education in astronomy was spotty at best. He attended the Norfolk Academy to study mathematics one winter, spent a year and a half at Central College at McGrawville, N. Y. , and received special instruction in astronomy from F. F. E. Brünnow during 3 months at the University of Michigan.
After a period as a schoolmaster in Ohio and some months working as a carpenter, in 1857 Hall finally secured a position at the Harvard Observatory. This gave him the opportunity to attend lectures and informally complete his education.
He proved to be a brilliant observer, and in 1859 he began to send papers, chiefly on the orbits of comets and asteroids, to scientific journals. In 1862 he went to Washington as an aide in the Naval Observatory and the following year was appointed professor of mathematics there. In 1872 Hall was made chief of the Naval Observatory. Five years later Hall, using the observatory's new 26-inch telescope, discovered the satellites of Mars.
Hall achieved a reputation as an extremely careful observer and an accurate mathematician and computer. His nearly 500 published papers include investigations of the orbits of the various satellites, the mass of Mars, the perturbations of the planets, the advance of Mercury's perihelion, the parallax of the sun, stellar parallax, the distances of Alpha Lyrae and 61 Cygni, the mass of Saturn's rings, and the orbits of double stars, along with the solution of many mathematical problems suggested by these investigations. Disdainful of textbooks and popularizations, Hall refused to publish a book.
Following his retirement from the Naval Observatory in 1891, Hall taught at Harvard and continued to work in astronomy.
He published his final paper in September 1906 and died on November 22, 1907.
Asaph Hall is most famous for having discovered the moons of Mars, Deimos and Phobos, in 1877. He determined the orbits of satellites of other planets and of double stars, the rotation of Saturn, and the mass of Mars.
In his lifetime he was the recipient of numerous scientific awards in the United States and abroad. Hall won the Lalande Prize of the French Academy of Sciences in 1878, the Gold Medal of the Royal Astronomical Society in 1879, the Arago Medal in 1893, and was made a Chevalier in the Ordre national de la Légion d'honneur (French Legion of Honor) in 1896. Hall crater on the Moon as well as Hall crater on the Martian moon Phobos are named in his honor. Asteroid 3299 Hall is also named in his honor.
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In 1902 he was elected president of the American Association for the Advancement of Science.
In 1856 he married Angeline Stickney. The Halls had four children. Asaph Hall, Jr. (1859–1930) became an astronomer, Samuel Stickney Hall (1864–1936) worked for Mutual Life Insurance Company, Angelo Hall (1868–1922) became a Unitarian minister and professor of mathematics at the US Naval Academy, and Percival Hall (1872–1953) became president of Gallaudet University. Angeline Hall died in 1892. Hall married Mary Gauthier after he fully retired to Goshen, Connecticut in 1901.
(1800–42)
(1804–80)
(June 11, 1735 – Mar. 29, 1800)
(1872–1953)
(1868–1922)
(1859–1930)
(1864–1936)
