Edward Emerson Barnard

Edward Emerson Barnard /ˈbɑːrnərd/ (December 16, 1857 – February 6, 1923) was an American astronomer. He was commonly known as E. E. Barnard, and was recognized as a gifted observational astronomer. He is best known for his discovery of the high proper motion of Barnard's Star in 1916, which is named in his honor.

Edward Emerson Barnard
Edward Emerson Barnard
Born(1857-12-16)December 16, 1857
Nashville, Tennessee
DiedFebruary 6, 1923(1923-02-06) (aged 65)
Williams Bay, Wisconsin
NationalityAmerican
Known for
Awards
Scientific career
Fieldsastronomy

Early life

Barnard was born in Nashville, Tennessee, to Reuben Barnard and Elizabeth Jane Barnard (née Haywood), and had one brother. His father died three months before his birth,[1] so he grew up in an impoverished family and did not receive much in the way of formal education. His first interest was in the field of photography, and he became a photographer's assistant at the age of nine.

He later developed an interest in astronomy. In 1876 he purchased a 5-inch (130 mm) refractor telescope, and in 1881 he discovered his first comet, but failed to announce his discovery. He found his second comet later the same year and a third in 1882.

While he was still working at a photography studio he was married to the British-born Rhoda Calvert in 1881. In the 1880s, Hulbert Harrington Warner offered US$200 per discovery of a new comet. Barnard discovered a total of five,[2] and used the money to build a house for himself and his wife.

With his name being brought to the attention of amateur astronomers in Nashville, they collectively raised enough money to give Barnard a fellowship to Vanderbilt University. He never graduated from the school, but did receive the only honorary degree Vanderbilt has ever awarded.[3] He joined the staff of the Lick Observatory in 1887, though he later clashed with the director, Edward S. Holden, over access to observing time on the larger instruments and other issues of research and management.[4]

Astronomical work

Barnard saw the gegenschein in 1882, not aware of earlier papers by Theodor Brorsen and T. W. Backhouse.[5] In 1889 he observed the moon Iapetus pass behind Saturn's rings. As he watched Iapetus pass through the space between Saturn's innermost rings and the planet itself, he saw a shadow pass over the moon. Although he did not realize it at the time, he had discovered proof of the "spokes" of Saturn, dark shadows running perpendicular to the circular paths of the rings. These spokes were doubted at first, but confirmed by the spacecraft Voyager 1.

In 1892 he made observations of a nova and was the first to notice the gaseous emissions, thus deducing that it was a stellar explosion. The same year he also discovered Amalthea, the fifth moon of Jupiter. He was the first to discover a new moon of Jupiter since Galileo Galilei in 1609. This was the last satellite discovered by visual observation (rather than by examining photographic plates or other recorded images).

In 1895 he joined the University of Chicago as professor of astronomy. There he was able to use the 40-inch (1,000 mm) telescope at Yerkes Observatory. Much of his work during this period was taking photographs of the Milky Way. Together with Max Wolf, he discovered that certain dark regions of the galaxy were actually clouds of gas and dust that obscured the more distant stars in the background. From 1905, his niece Mary R. Calvert worked as his assistant and computer.

The faint Barnard's Star is named for Edward Barnard after he discovered in 1916 that it had a very large proper motion, relative to other stars. This is the second nearest star system to the Sun, second only to the Alpha Centauri system.

He was also a pioneering astrophotographer. His Barnard Catalogue lists a series of dark nebulae, known as Barnard objects, giving them numerical designations akin to the Messier catalog. They begin with Barnard 1 and end with Barnard 370. He published his initial list with the 1919 paper in the Astrophysical Journal, "On the Dark Markings of the Sky with a Catalogue of 182 such Objects".

He died on February 6, 1923 in Williams Bay, Wisconsin, and was buried in Nashville. After his death, many examples from his exceptional collection of astronomical photographs were published in 1927 as A Photographic Atlas of Selected Regions of the Milky Way, this work having been finished by Mary R. Calvert, and Edwin B. Frost, then director of Yerkes Observatory.

Comet discoveries

Between 1881 and 1892, he discovered 15 comets, three of which were periodic, and co-discovered two others:

  • C/1881 did not announce
  • C/1881 S1
  • C/1882 R2
  • D/1884 O1 (Barnard 1)
  • C/1885 N1
  • C/1885 X2
  • C/1886 T1 Barnard-Hartwig
  • C/1887 B3
  • C/1887 D1
  • C/1887 J1
  • C/1888 U1
  • C/1888 R1
  • C/1889 G1
  • 177P/Barnard (P/1889 M1, P/2006 M3, Barnard 2)
  • C/1891 F1 Barnard-Denning
  • C/1891 T1
  • D/1892 T1 (Barnard 3) – First comet to be discovered by photography; recovered in late 2008 as 206P/Barnard-Boattini

Honors

Awards

Named after him

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See also

References
  1. Hockey, Thomas (2009). The Biographical Encyclopedia of Astronomers. Springer Publishing. ISBN 978-0-387-31022-0. Retrieved August 22, 2012.
  2. Frost, E. B., "Edward Emerson Barnard" The Astrophysical Journal, vol. 58, p. 1 – 1923ApJ....58....1F
  3. Carey, Bill (October 29, 2001). "Astronomer Barnard was among Vanderbilt's first academic superstars". The Vanderbilt Register. Archived from the original on February 11, 2007. Retrieved June 27, 2007.
  4. Osterbrock, Donald E., The Rise and Fall of Edward S. Holden – Part One, JOURN. HISTORY OF ASTRONOMY V.15:2, No. 43, p. 81 at 95–98, 1984
  5. Ley, Willy (April 1961). "The Puzzle Called Gegenschein". For Your Information. Galaxy Science Fiction. pp. 74–84.
  6. "Book of Members, 1780-2010: Chapter B" (PDF). American Academy of Arts and Sciences. Retrieved May 17, 2011.
  7. "Edward Emerson Barnard". The Bruce Medalists. Sonoma State University Department of Physics & Astronomy. Retrieved November 6, 2017.

Further reading
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