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Dust in early galaxies
Dust in early galaxies is the solid grains formed in galaxies within roughly the first billion years of cosmic history, seen by ALMA at redshifts as high as 7.
Dust in fusion plasmas
Dust in fusion plasmas is particulate matter up to about 1 mm that forms in magnetic confinement devices, studied chiefly as a safety inventory for ITER.
Dust storm
A dust storm, or sandstorm, is a weather event where strong winds lift sand and dust from dry soil, often forming a miles-long wall of dust.
Dust-obscured galaxy
A dust-obscured galaxy is a galaxy whose interstellar dust absorbs starlight and re-emits it in the infrared, hiding it from optical surveys; possibly half of early star formation was obscured.
Dust-obscured star formation in submillimeter galaxies
Dust-obscured star formation in submillimeter galaxies is the process by which intensely star-forming high-redshift galaxies hide stellar birth behind dust, making submillimeter galaxies bright at submillimeter wavelengths while faint optically.
Dust-to-gas ratio
The dust-to-gas ratio is the mass of interstellar dust divided by the mass of gas in a region or galaxy, about 1 percent in the Milky Way.
Dustin Clausen
Dustin Clausen is an American mathematician known for algebraic K-theory and for developing condensed mathematics with Peter Scholze; he has been a permanent professor at IHES since 2023.
Dustin M. Schroeder
Dustin M. Schroeder is an American geophysicist and Associate Professor at Stanford University known for ice-penetrating radar studies of Thwaites Glacier and NASA's Europa Clipper mission.
Dusty plasma
A dusty plasma, also called a complex plasma, is a plasma containing charged solid or liquid particles, found in planetary rings, comet tails, and semiconductor processing discharges.
Dusty torus
A dusty torus is an optically thick distribution of dust around the accretion disk and supermassive black hole of an active galactic nucleus, re-emitting absorbed radiation in the infrared.
Dutch book arguments
Dutch book arguments, also called Dutch book theorems, hold that degrees of belief should satisfy the probability axioms because incoherent beliefs allow bets guaranteeing a loss.
Duvernay Formation
The Duvernay Formation is an organic-rich Upper Devonian shale in Alberta that is both a major oil and gas source rock and an unconventional reservoir.
Dvapara Yuga (द्वापर युग)
Dvapara Yuga (द्वापर युग), also called Dwapar Yuga, is the third of the four world-ages in Hindu cosmology, preceding Kali Yuga and traditionally lasting 864,000 human years.
Dvorak technique
The Dvorak technique is a method for estimating tropical cyclone intensity from satellite imagery, developed by Vernon Dvorak at NOAA in the early 1970s and still the worldwide standard.
Dwarf galaxy
A dwarf galaxy is a small, low-luminosity galaxy containing about 100 million to a few billion stars, and the most common type of galaxy, often orbiting a larger host.
Dwarf nova
A dwarf nova is a type of cataclysmic variable, a close binary in which a white dwarf accretes matter from a companion and brightens 2 to 8 magnitudes.
Dwarf planet
A dwarf planet is a celestial body that orbits the Sun, is nearly round, and has not cleared its orbital neighborhood, a category created in 2006.
Dwarf spheroidal galaxy
A dwarf spheroidal galaxy (dSph) is a small, faint, gas-poor satellite galaxy with no disk, dominated in mass by dark matter; Sculptor, found in 1937, was the first known.
Dwarf star
A dwarf star is a star of average or low luminosity, mass, and size; unqualified, it means a main sequence star, like the Sun, fusing hydrogen in its core.
Dwight Clark Carpenter
Dwight Clark Carpenter (1890–1953) was an American chemist and Cornell professor who spent his career studying protein chemistry at the New York Experiment Station in Geneva, New York.
Dwight Seferos
Dwight Seferos, also known as Dwight S. Seferos, was a University of Toronto chemistry professor who studied conjugated polymers for solar cells and batteries until his death in 2026.
DWK Life Sciences
DWK Life Sciences is a German-headquartered manufacturer of laboratory glassware, plastic labware, and pharmaceutical packaging, formed in June 2017 through the merger of Duran Group, Wheaton Industries, and Kimble Chase.
Dyadic analysis
Dyadic analysis is a set of statistical methods for data from pairs of people, such as couples or friends, whose outcomes are interdependent, most commonly modeled with the actor–partner interdependence model.
Dyadics
Dyadics, also called dyadic tensors or dyadic products, are second-order tensors built as sums of dyads, introduced by Josiah Willard Gibbs in the early 1880s.
Dyck path
A Dyck path is a lattice path of up and down steps that starts and ends at level 0 and never goes below, counted by Catalan numbers.
Dye laser
A dye laser is a laser whose gain medium is a fluorescent organic dye in liquid solvent, the first broadly tunable laser, invented in 1966 at IBM.
Dye tracing
Dye tracing is a hydrogeology technique that injects fluorescent dye, typically uranine, into water and measures it downstream to reveal underground flow paths and velocities.
Dylan Armstrong
Dylan Armstrong is an independent, US-based researcher with no listed institutional affiliation who self-publishes preprints on computational chemistry, physics modeling, and innovation theory, including the AREECM and AHMGF models.
Dylan Dreyer
Dylan Dreyer, full name Dylan Marie Dreyer, is an American television meteorologist with NBC News who joined Weekend Today in 2012 and co-hosts the 3rd Hour of Today.
Dynamic aperture
Dynamic aperture is the maximum stable transverse oscillation amplitude in a circular accelerator with nonlinear fields; beyond it, particle amplitudes grow until they are lost, so it is generally smaller than the physical beam tube.