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Hubble Deep Field
The Hubble Deep Field is a small patch of sky in Ursa Major that the Hubble Space Telescope imaged for ten days in 1995, revealing about 3,000 distant galaxies.
Hubble diagram
A Hubble diagram is a plot of distance or brightness against redshift for astronomical objects, used to trace the expansion history of the universe and the dark energy driving it.
Hubble flow
The Hubble flow is the uniform expansion of space that carries galaxies away from one another, so a galaxy's recessional velocity grows in proportion to its distance.
Hubble Frontier Fields
The Hubble Frontier Fields was a Hubble and Spitzer program begun in 2013 that used six galaxy clusters as natural telescopes to magnify the most distant galaxies.
Hubble radius
The Hubble radius, the boundary of the Hubble sphere, is the distance at which galaxies recede at light speed in an expanding universe, about 10 billion light-years today.
Hubble sequence
The Hubble sequence is a morphological classification scheme for galaxies published by Edwin Hubble in 1926, ordering galaxies into ellipticals, spirals, and irregulars; its two-pronged layout is the tuning-fork diagram.
Hubble tension
The Hubble tension is the significant disagreement between direct local measurements of the Hubble constant, near 73, and lower early-universe values near 67, a serious challenge to the standard ΛCDM model.
Hubble Ultra-Deep Field
The Hubble Ultra-Deep Field is a 2004 Hubble Space Telescope image of a small patch of Fornax showing at least 10,000 galaxies, many extremely distant.
Hubble volume
A Hubble volume is the region of the universe within the Hubble radius, the distance at which recession from the observer reaches the speed of light.
Hubble's law
Hubble's law, also called the Hubble–Lemaître law, is the cosmological observation that a galaxy's recessional velocity is proportional to its distance, discovered by Edwin Hubble in 1929.
Huber loss
The Huber loss is a loss function in robust regression that is quadratic for small residuals and linear for large ones, limiting the influence of outliers.
Hubert Anson Newton
Hubert Anson Newton (1830–1896) was an American mathematician and astronomer, professor at Yale from 1855, who founded meteoric astronomy through his studies of the November meteor showers.
Hubert Bradford Vickery
Hubert Bradford Vickery (1893–1978) was a Canadian-born American biochemist who spent his career at the Connecticut Agricultural Experiment Station studying plant proteins, amino acids, and organic acids.
Hubert H. Girault
Hubert H. Girault, born 1957, is a French electrochemist and emeritus professor at EPFL, known for electrochemistry at soft interfaces, off-gel electrophoresis, and redox flow batteries producing hydrogen.
Hubert Heffner
Hubert Heffner (1924–1975) was an American applied physicist at Stanford University who worked on microwave devices and quantum electronics, and a member of the National Academy of Engineering.
Hubert Lamb
Hubert Horace Lamb (1913–1997) was a British climatologist who founded the Climatic Research Unit at the University of East Anglia, coined terms, and popularized the 'Little Ice Age.'
Hubert Schmidbaur
Hubert Schmidbaur, born 1934 in Bavaria, is a German inorganic chemist who held the Chair of Inorganic and Analytical Chemistry at the Technical University of Munich from 1973 to 2003.
Hubertus Fischer
Hubertus Fischer is a Swiss-based climate physicist, professor at the University of Bern since 2008, known for reconstructing past greenhouse gases from polar ice cores and winning the 2018 Hans Oeschger Medal.
Hückel method
The Hückel method, or Hückel molecular orbital theory, is a simplified semiempirical quantum-chemical method devised by Erich Hückel that computes π-electron orbitals of conjugated hydrocarbons.
Hückel's rule
Hückel's rule, or the Hückel 4n + 2 rule, states that a planar, fully conjugated monocyclic ring is aromatic with 4n + 2 π electrons.
Hudbay Minerals
Hudbay Minerals Inc. is a Canadian mining company headquartered in Toronto that produces copper, zinc, gold, and silver from operations in Manitoba, British Columbia, and Peru.
HudsonAlpha Institute for Biotechnology
HudsonAlpha Institute for Biotechnology is a nonprofit genomics research institute in Huntsville, Alabama, combining research, clinical medicine, education, and biotech economic development on one campus.
Hugh Allen Oliver Hill
Hugh Allen Oliver Hill (1937–2021) was a bioinorganic chemist at the University of Oxford who pioneered protein electrochemistry and invented the ferrocene-mediated glucose electrode used by millions of diabetics.
Hugh Churchill
Hugh Churchill is an American condensed matter physicist, Professor and 21st Century Chair in Nanophysics at the University of Arkansas, working on superconducting and two-dimensional quantum devices.
Hugh Everett III
Hugh Everett III (1930–1982) was an American physicist who proposed the many-worlds interpretation of quantum mechanics in 1957, then spent his career on military operations research, including nuclear-war strategy.
Hugh Longbourne Callendar
Hugh Longbourne Callendar (1863–1930) was a British physicist who developed the practical platinum resistance thermometer, the continuous-flow calorimeter, and the steam tables adopted by British engineers.
Hugh Muirhead
Hugh Muirhead (1925–2007) was a British nuclear physicist who, as a young Bristol graduate, co-discovered the pion in 1947 and later wrote particle physics textbooks.
Hugh P. Taylor Jr.
Hugh P. Taylor Jr. was an American geochemist at the California Institute of Technology known for applying oxygen-isotope measurements to rocks, tektites, and Apollo lunar samples.
Hugh Scott Taylor
Hugh Scott Taylor, also known as Sir Hugh Stott Taylor, was a British-born American physical chemist at Princeton University who proposed the theory of active centers in heterogeneous catalysis.
Hugh Stott Taylor
Hugh Stott Taylor was a British-born physical chemist who spent his career at Princeton University and proposed in 1925 that only a fraction of a catalyst's surface, the active centers, carries out catalysis.