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...

the size of the Milky Way. Seyfert galaxies are named after Carl Seyfert, who first described this class in 1943. Seyfert galaxies were first detected...

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...

co;2. International Tectonic Dictionary – AAPG Memoir 7, 1967 The Encyclopedia of Structural Geology and Plate Tectonics – Ed. by Carl K. Seyfert, 1987...

form a single giant elliptical galaxy. The group was discovered by Carl Keenan Seyfert using photographic plates made at the Barnard Observatory of Vanderbilt...

the presence of unusual emission lines in some galaxy nuclei. In 1943, Carl Seyfert published a paper in which he described observations of nearby galaxies...

2 Seyfert galaxy and one of the most well studied Seyfert galaxies. In 1943, this galaxy was one of six nebulae listed by American astronomer Carl K. Seyfert...

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

an active nucleus. This caused Carl Seyfert in 1943 to include it in his list of galaxies, which are now called Seyfert Galaxies. However, NGC 3077, though...

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