42,772 articles
Kenneth Street Jr.
Kenneth Street Jr. was an American nuclear chemist at the University of California, Berkeley, co-discoverer of californium in 1950 and a developer of ion-exchange separation chemistry.
Kenneth W. Bruland
Kenneth W. Bruland is an American chemical oceanographer at UC Santa Cruz known for clean trace-metal sampling techniques and work showing iron limits phytoplankton growth.
Kenneth Watson (physicist)
Kenneth Marshall Watson (1921–2023) was an American theoretical physicist, a UC Berkeley professor elected to the National Academy of Sciences in 1974, known for scattering theory.
Kenorland
Kenorland is a hypothesized Neoarchean supercontinent, proposed in 1991, that joined North American cratons with Baltica and possibly Siberia before breaking up around 2.45 Ga.
Kensal E. van Holde
Kensal E. van Holde (1928–2019) was an American physical biochemist known for his work on chromatin and hemocyanins, and a professor at Oregon State University.
Kenso Soai
Kenso Soai (硤合憲三), born 1950 in Hiroshima, is a Japanese organic chemist and Professor Emeritus at Tokyo University of Science who shared the 2026 Nobel Prize in Chemistry for discovering asymmetric autocatalysis.
Kensuke Hirata
Kensuke Hirata is a Japanese physicist at the University of Tokyo who was first author of Kamiokande-II's landmark papers on the 1987 supernova neutrino burst and solar neutrinos.
Kent Ford (astronomer)
W. Kent Ford Jr. (April 8, 1931 – June 18, 2023) was an American astronomer and instrumentalist at Carnegie's DTM whose image-tube spectrograph enabled Vera Rubin's evidence for dark matter.
Kentaro Yamaguchi
Kentaro Yamaguchi (山口 健太郎, born 1953) is a Japanese chemist and mass spectrometrist known for developing cold-spray ionization mass spectrometry, and a professor at Tokushima Bunri University since 2004.
Kentaro Yano (mathematician)
Kentaro Yano (1912–1993) was a Japanese differential geometer who spent his career at the Tokyo Institute of Technology and is known for Lie derivatives, concircular geometry, and the Bochner–Yano rigidity theorems.
Kenton Rodgers
Kenton R. Rodgers is an American bioinorganic chemist and professor at North Dakota State University in Fargo, known for spectroscopic studies of heme proteins and bacterial gas-sensing proteins.
Kentucky meat shower
The Kentucky meat shower, also known as Kentucky meat rain, was the fall of raw meat chunks from a clear sky over Bath County, Kentucky, on March 3, 1876.
Kepler conjecture
The Kepler conjecture, now a theorem, states that no packing of equal spheres in space exceeds the density of about 74.05% achieved by stacking oranges in the usual pyramid way.
Kepler problem
The Kepler problem asks for the motion of two bodies attracting with an inverse-square force, such as a planet and the Sun; its orbits are conic sections.
Kepler-1625b I
Kepler-1625b I is a candidate exomoon of the Jupiter-sized planet Kepler-1625b, 8,000 light-years away in Cygnus, claimed in 2018 and disputed since, with no moon confirmed.
Kepler-186f
Kepler-186f is an Earth-size exoplanet about 500 light-years away in the constellation Cygnus, announced in 2014 as the first Earth-size planet found orbiting a red dwarf within its habitable zone.
Kepler-22b
Kepler-22b is an exoplanet about 2.4 times Earth's radius orbiting the sun-like star Kepler-22 every 290 days, the first planet NASA's Kepler mission confirmed in a habitable zone.
Kepler-442b
Kepler-442b, also designated KOI-4742.01, is a super-Earth exoplanet orbiting the K-type star Kepler-442 in Lyra, about 1,200 light-years away, announced in 2015 and ranked among the most Earth-like planets known.
Kepler-452b
Kepler-452b is a candidate super-Earth exoplanet orbiting the Sun-like star Kepler-452 about 1,400 light-years away, announced in 2015 as a possibly rocky planet in the habitable zone, though a 2018 reanalysis left it unconfirmed.
Kepler-90i
Kepler-90i is a hot, rocky exoplanet, the eighth planet around the Sun-like star Kepler-90, discovered in December 2017 by a neural network searching archived Kepler data.
Kepler–Poinsot polyhedron
A Kepler–Poinsot polyhedron, also called a Kepler–Poinsot solid, is one of the four regular star polyhedra, non-convex counterparts of the Platonic solids, named for Kepler and Poinsot.
Kepler's equation
Kepler's equation is the relation M = E - e sin E connecting position on an elliptical orbit to elapsed time, solved only by numerical iteration.
Kepler's laws of planetary motion
Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, state that planets orbit the Sun in ellipses, sweep equal areas in equal times, and obey a period-distance relation.
Kepler's Supernova
Kepler's Supernova, also known as Kepler's Star, was a Type Ia supernova in Ophiuchus seen from Earth in 1604, the last supernova observed in the Milky Way.
Keratan sulfate
Keratan sulfate is a sulfated glycosaminoglycan with no uronic acid, first identified in the cornea in 1939, where it helps maintain transparency and serves as a disease marker.
Kerberos
Kerberos (S/2011 (134340) 1, P4) is a small moon of Pluto discovered by Hubble in 2011, orbiting between Nix and Hydra with a 32.17-day period, a double-lobed ~19 km body of bright water ice.
Kereszyély Corrádi
Kereszyély Corrádi, also known as Corrádi Keresztély, is a Hungarian mathematician at Eötvös Loránd University known for the 1963 Corrádi–Hajnal theorem on disjoint cycles in graphs.
Kerker effect
The Kerker effect is a directional light-scattering phenomenon in which a small particle radiates no light backward, predicted in 1983 and now a design principle for nanoantennas and metasurfaces.
Kernel (algebra)
The kernel (also called the kernel of a homomorphism) in algebra is the set of elements a homomorphism sends to zero, a submodule measuring injectivity.
Kernel (linear algebra)
The kernel of a linear map, also called its null space, is the set of all domain vectors the map sends to zero; it is a linear subspace of the domain.