Carl Keenan Seyfert (February 11, 1911 – June 13, 1960) was an American astronomer. He is best known for his 1943 research paper on high-excitation line...

Seyfert is a surname, and may refer to: Carl Keenan Seyfert (1911–1960), United States astronomer Gabriele Seyfert (born 1948), German athlete in figure...

Seyfert is a prominent lunar impact crater that is located on the far side of the Moon. It was named after American astronomer Carl Keenan Seyfert. It...

"nebulae" and classified them as extragalactic objects. In 1943, Carl Keenan Seyfert discovered more galaxies similar to NGC 1068 and reported that these...

individual galaxies in the group. The group members were discovered by Carl Keenan Seyfert using photographic plates made at the Barnard Observatory of Vanderbilt...

source Cygnus A. 1943 — Carl Keenan Seyfert identifies six spiral galaxies with unusually broad emission lines, named Seyfert galaxies, 1949 — J. G. Bolton...

Waltraut Seitter (Germany, 1930–2007) Tsutomu Seki (Japan, 1930–) Carl Keenan Seyfert (United States, 1911–1960) Grigory Abramovich Shajn (Russia, 1892–1956)...

silversmith – Sequoia (genus), Sequoyah County, Oklahoma. Carl Keenan Seyfert, American astronomer - Seyfert's Sextet. Max Shachtman, American politician – Shachtmanism...

first observatory director Carl Keenan Seyfert, are located in the Dyer Observatory in a stairway leading up to the Seyfert Telescope. On March 18, 1952...

Phoenix, named after Robert Freedman. Seyfert's Sextet is a group of galaxies in Serpens, named after Carl Keenan Seyfert. Stephan's Quintet is a group of...

cells – Enrico Sertoli Serre duality – Jean-Pierre Serre Seyfert galaxy – Carl Keenan Seyfert Shapiro effect – Irwin Shapiro Shimizu–Morioka attractor...

produce spectral line emission from highly ionized gas, named after Carl Keenan Seyfert, the astronomer who first identified the class in 1943 although they...

Bible Carl Keenan Seyfert – astronomer, known for research on high-excitation line emission from the centers of some spiral galaxies named Seyfert galaxies...

astronomer Carl Keenan Seyfert that showed broad emission lines in their nuclei. Members of this class of objects became known as Seyfert galaxies, and...

Archived from the original on 2007-02-11. Retrieved 2007-06-27. "Carl Keenan Seyfert (1911-1960)". Students for the Exploration and Development of Space...

astronomer Carl Keenan Seyfert that showed broad emission lines in their nuclei. Members of this class of objects became known as Seyfert galaxies, and...

Ján Andrej Segner Hugh Sempill Seneca the Younger Gerolamo Sersale Carl Keenan Seyfert Abraham Sharp Anne Sheepshanks Shi Shen Wacław Sierpiński Johann...

(4 BC.-65 AD.) WGPSN Seyfert 29°16′N 114°20′E / 29.26°N 114.34°E / 29.26; 114.34 (Seyfert) 102.63 1970 Carl Keenan Seyfert (1911–1960) WGPSN Shackleton...

Cannon". www.projectcontinua.org. Retrieved 10 June 2020. Nassau, J. J.; Seyfert, Carl K. (March 1946). "Spectra of BD Stars Within Five Degrees of the North...

classification was published in 1943 by William Wilson Morgan and Philip Childs Keenan based on the Hertzsprung-Russel Diagram. Astronomers also began debating...

interstellar matter and observational study of active galaxies, especially of Seyfert and related galaxies. JPL · 10138 10139 Ronsard 1993 ST4 Pierre de Ronsard...

particularly bright, star-like nucleus. As a group, they are intermediate between Seyfert galaxies and Quasar. Most are giant ellipticals that are radio sources...