Who is regarded as one of the most important astronomers of all time, and invented a morphological classification scheme for galaxies?
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Hubble sequence The Hubble sequence is a morphological classification scheme for galaxies invented by Edwin Hubble in 1926. It is often known colloquially as the Hubble tuning fork diagram because of the shape in which it is traditionally represented.
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Edwin Hubble Edwin Powell Hubble (November 20, 1889 – September 28, 1953) was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology and is regarded as one of the most important astronomers of all time.
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C.C.L. Gregory Christopher Clive Langton Gregory (13 May 1892 – 24 November 1964) was a British astronomer, who established the University of London Observatory.
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European Astronomical Society The European Astronomical Society (EAS) is a learned society, founded under the Swiss Civil Code in 1990, as an association to contribute and promote the advancement of astronomy in Europe, and to deal with astronomical matters at a European level. It is a society of individual professional astronomers, and all European astronomers can be members independently of their field of work or country of work or origin. The society offers a forum for discussion on all aspects of astronomical development in Europe, and is the organisation that represents the interests of astronomers in discussions of European-wide developments.
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Flinders Petrie Sir William Matthew Flinders Petrie, FRS, FBA (3 June 1853 – 28 July 1942), commonly known as Flinders Petrie, was an English Egyptologist and a pioneer of systematic methodology in archaeology and preservation of artifacts. He held the first chair of Egyptology in the United Kingdom, and excavated many of the most important archaeological sites in Egypt in conjunction with his wife, Hilda Petrie. Some consider his most famous discovery to be that of the Merneptah Stele, an opinion with which Petrie himself concurred. Petrie developed the system of dating layers based on pottery and ceramic findings.
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Charles Darwin Charles Robert Darwin, {'1': ", '2': ", '3': ", '4': "} ( ; 12 February 1809 – 19 April 1882) was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution. He established that all species of life have descended over time from common ancestors and, in a joint publication with Alfred Russel Wallace, introduced his scientific theory that this branching pattern of evolution resulted from a process that he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding.
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Carl Keenan Seyfert 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 emission from the centers of some spiral galaxies, which are named Seyfert galaxies after him. Seyfert's Sextet, a group of galaxies, is also named after him.
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Blue straggler A blue straggler is a main-sequence star in an open or globular cluster that is more luminous and bluer than stars at the main-sequence turn-off point for the cluster. Blue stragglers were first discovered by Allan Sandage in 1953 while performing photometry of the stars in the globular cluster M3. Standard theories of stellar evolution hold that the position of a star on the Hertzsprung–Russell diagram should be determined almost entirely by the initial mass of the star and its age. In a cluster, stars all formed at approximately the same time, and thus in an H–R diagram for a cluster, all stars should lie along a clearly defined curve set by the age of the cluster, with the positions of individual stars on that curve determined solely by their initial mass. With masses two to three times that of the rest of the main-sequence cluster stars, blue stragglers seem to be exceptions to this rule. The resolution of this problem is likely related to interactions between two or more stars in the dense confines of the clusters in which blue stragglers are found.
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Isaac Newton in popular culture Isaac Newton was an English mathematician, natural philosopher, theologian, alchemist and one of the most influential scientists in human history. His "Philosophiae Naturalis Principia Mathematica" is considered to be one of the most influential book in the history of science, laying the groundwork for most of classical mechanics by describing universal gravitation and the three laws of motion. In mathematics, Newton shares the credit with Gottfried Leibniz for the development of the differential and integral calculus.
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Evangelista Torricelli Evangelista Torricelli (] ,    ); 15 October 1608 – 25 October 1647) was an Italian physicist and mathematician, best known for his invention of the barometer, but is also known for his advances in optics and work on the method of indivisibles.
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John Gould John Gould FRS ( ; 14 September 1804 – 3 February 1881) was an English ornithologist and bird artist. He published a number of monographs on birds, illustrated by plates that he produced with the assistance of his wife, Elizabeth Gould, and several other artists including Edward Lear, Henry Constantine Richter, Joseph Wolf and William Matthew Hart. He has been considered the father of bird study in Australia and the Gould League in Australia is named after him. His identification of the birds now nicknamed "Darwin's finches" played a role in the inception of Darwin's theory of evolution by natural selection. Gould's work is referenced in Charles Darwin's book, "On the Origin of Species".
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Space science in Estonia The cornerstone of the Estonian cosmological research is the Tartu Observatory which was founded in 1812. The observatory itself has a long tradition of studying galaxies and theoretically modeling the structure of the universe and its formation. Till today this facility is Estonia’s main research centre for astronomy and atmospheric physics, with fundamental research focusing on physics of galaxies, stellar physics and remote sensing of the Earth’s atmosphere and ground surface. The observatory has also played a vital role in catapulting the career of Jaan Einasto, one of the most famous and eminent Estonian astrophysicists and one of the discoverers of "Dark Matter" and of the cellular structure of the Universe.
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Ed Krupp Edwin Charles Krupp (born November 18, 1944) is an American astronomer, researcher, author, and popularizer of science. He is also known as Ed or E.C. He is an internationally recognized expert in the field of archaeoastronomy, the study of how ancient cultures viewed the sky and how those views affected their cultures. He has taught at the college level, as a planetarium lecturer, and in various documentary films. He has been the director of the Griffith Observatory in Los Angeles since first taking over the position in 1974 after the departure of the previous director, William J. Kaufmann III. His writings include science papers and journal articles, astronomy magazine articles, books on astronomy and archaeoastronomy for adults, and books explaining sky phenomena and astronomy to children.
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NGC 6373 NGC 6373 is a barred spiral galaxy located in the constellation Draco. It is designated as SBc in the galaxy morphological classification scheme and was discovered by the American astronomer Lewis A. Swift on 13 June 1985. There are two recorded supernovaes 2001ad and 2012an in this galaxy.<ref name="NASA/IPAC"> </ref>
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Faber–Jackson relation The Faber–Jackson relation is an early empirical power-law relation between the luminosity formula_1 and the central stellar velocity dispersion formula_2 of elliptical galaxies, first noted by the astronomers Sandra M. Faber and Robert Earl Jackson in 1976. The original relation can be expressed mathematically as:
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Luboš Perek He is most renowned for his "Catalogue of Galactic Planetary Nebulae" with Luboš Kohoutek in 1967. He also worked or works on the distribution of mass in the galaxy, high-velocity stars, planetary nebulae, definition of outer space, geostationary orbit, space debris, and management of outer space.
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Paul W. Hodge Paul W. Hodge (born 1934) is an American astronomer whose principal area of research is the stellar populations of galaxies.
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Martin Ryle Sir Martin Ryle FRS (27 September 1918 – 14 October 1984) was an English radio astronomer who developed revolutionary radio telescope systems (see e.g. aperture synthesis) and used them for accurate location and imaging of weak radio sources. In 1946 Ryle and Vonberg were the first people to publish interferometric astronomical measurements at radio wavelengths, although Joseph Pawsey from the University of Sydney claimed to have actually made interferometric measurements earlier in the same year. With improved equipment, Ryle observed the most distant known galaxies in the universe at that time. He was the first Professor of Radio Astronomy at the University of Cambridge, and founding director of the Mullard Radio Astronomy Observatory. He was Astronomer Royal from 1972 to 1982. Ryle and Antony Hewish shared the Nobel Prize for Physics in 1974, the first Nobel prize awarded in recognition of astronomical research.
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William Ernest Cooke William Ernest Cooke (25 July 1863 – 7 November 1947), generally referred to as "W. Ernest Cooke" or informally "Ernest Cooke", was an Australian astronomer, credited with a number of important scientific breakthroughs and improved methodologies in astronomical observations and star cataloguing. He was the first Western Australian Government Astronomer and established the Perth Observatory as one of the best equipped and productive establishments of its type in Australia.
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Astronomer An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of Earth. They look at stars, planets, moons, comets and galaxies, as well as many other celestial objects — either in observational astronomy, in analyzing the data or in theoretical astronomy. Examples of topics or fields astronomers work on include: planetary science, solar astronomy, the origin or evolution of stars, or the formation of galaxies. There are also related but distinct subjects like physical cosmology which studies the Universe as a whole.
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Hasan Tahsini Hasan Tahsini (7 April 1811 – 3 July 1881) also known as Hoxha Tahsin was an Albanian astronomer, mathematician and philosopher. He was the first rector of Istanbul University and one of the founders of the Central Committee for Defending Albanian Rights. Tahsini is regarded as one of the most prominent scholars of the Ottoman Empire of the 19th century.
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NGC 4707 NGC 4707 is an irregular galaxy in the constellation of Canes Venatici. It was discovered by John Herschel on 5 June 1834, and was described by John Louis Emil Dreyer, the compiler of the New General Catalogue, as a "small, stellar" galaxy.