497 articles
Joel N. Bregman
Joel N. Bregman is an astronomer, the H.D. Curtis Professor at the University of Michigan, whose research on hot X-ray-emitting galaxy halos seeks the universe's missing baryons.
Joel R. Primack
Joel R. Primack (1945–2025) was an American theoretical physicist and astrophysicist at UC Santa Cruz, a principal originator of the cold dark matter theory of galaxy formation.
John A. Peacock
John A. Peacock is a cosmologist and Professor of Cosmology at the University of Edinburgh, known for leading the 2dF Galaxy Redshift Survey and co-inventing the halo model.
John Archibald Wheeler
John Archibald Wheeler was an American theoretical physicist at Princeton University who popularized the term "black hole" and co-authored the 1939 paper explaining nuclear fission with Niels Bohr.
John Bally
John Bally is an astrophysicist and Professor Emeritus of Astrophysical and Planetary Sciences at the University of Colorado Boulder, known for research on star formation, protostellar outflows, and stellar feedback.
John C. Mather
John C. Mather is an American astrophysicist at NASA Goddard who shared the 2006 Nobel Prize in Physics for measuring the cosmic microwave background from the COBE satellite.
John Carlstrom
John Carlstrom (born 1957) is an American experimental astrophysicist at the University of Chicago who leads the South Pole Telescope, measuring the cosmic microwave background.
John D. Barrow
John D. Barrow, also known as John David Barrow, was a British cosmologist and Cambridge professor who won the 2006 Templeton Prize for popularizing science.
John F. Hawley
John F. Hawley (1958–2021) was an American astrophysicist at the University of Virginia who, with Steven Balbus, identified the magnetorotational instability that lets gas spiral inward through accretion disks.
John Huchra
John Huchra (1948–2010) was an American observational astronomer at the Center for Astrophysics whose redshift surveys revealed the Great Wall and helped fix the Hubble constant.
John L. Tonry
John L. Tonry is an American astronomer at the University of Hawaiʻi known for dark energy research, the surface brightness fluctuation distance method, Pan-STARRS, and the ATLAS asteroid warning system.
John N. Bahcall
John N. Bahcall (1934–2005) was an American astrophysicist at the Institute for Advanced Study who built the Standard Solar Model and championed the Hubble Space Telescope.
Jon M. Miller
Jon M. Miller (Jon Matthew Miller) is an American high-energy astrophysicist at the University of Michigan who studies black holes and neutron stars through X-ray spectroscopy.
Joop Schaye
Joop Schaye is an astronomer and full professor of galaxy formation at Leiden Observatory since 2011, who led the EAGLE cosmological simulation and leads the COLIBRE project.
Jorge Sahade
Jorge Sahade (1915–2012) was an Argentine astrophysicist known for his work on interacting binary stars and as the first Latin American president of the International Astronomical Union.
José Luis Sérsic
José Luis Sérsic (1933–1993) was an Argentine astronomer at the Observatorio Astronómico de Córdoba, a pioneer of Southern Hemisphere extragalactic astronomy known for the Sérsic profile.
José María Maza Sancho
José María Maza Sancho, born in Valparaíso in 1948, is a Chilean astronomer and 1999 National Prize winner whose Calán-Tololo supernova calibration underpinned the discovery of the accelerating universe.
Joseph H. Taylor Jr.
Joseph H. Taylor Jr. (Joseph Hooton Taylor) is an American radio astronomer who shared the 1993 Nobel Prize in Physics for discovering the first binary pulsar.
Joseph Silk
Joseph Silk, born 1942 in London, is a British and US cosmologist known for Silk damping, cosmic microwave background anisotropy theory, and the physics of galaxy formation.
Joseph Weber
Joseph Weber (1919–2000) was an American physicist at the University of Maryland who founded the experimental search for gravitational waves and pioneered the resonant bar detector.
Joshua N. Goldberg
Joshua N. Goldberg, also known as Joshua Norman Goldberg, was an American mathematical physicist at Syracuse University known for the 1962 Goldberg–Sachs theorem on Einstein's equations.
Julian H. Krolik
Julian H. Krolik, also published as J. H. Krolik, is an American theoretical astrophysicist and professor at Johns Hopkins University, known for his 1999 textbook Active Galactic Nuclei.
Julio Navarro (Argentine-Canadian astrophysicist)
Julio F. Navarro, born 1962 in Santiago del Estero, Argentina, is an Argentine-Canadian cosmologist at the University of Victoria, co-author of the influential Navarro–Frenk–White profile describing dark matter halos.
Juna Kollmeier
Juna Kollmeier is an astrophysicist at the Carnegie Observatories who directs the Sloan Digital Sky Survey V and studies supermassive black holes and the intergalactic medium.
Jürgen Ehlers
Jürgen Ehlers (1929–2008) was a German theoretical physicist known for work on exact solutions of the Einstein field equations and the Newtonian limit of general relativity.
Juri Poutanen
Juri Poutanen is a Finnish astronomer, professor and director of Tuorla Observatory at the University of Turku, working on accreting black holes and X-ray polarimetry.
Karl Glazebrook
Karl Glazebrook, born 1965, is a British-born observational astronomer at Swinburne University of Technology in Melbourne, known for establishing massive galaxies existed three billion years after the Big Bang.
Katerina Chatziioannou
Katerina Chatziioannou is a theoretical astrophysicist and Professor of Physics at Caltech who studies neutron-star matter and tests of general relativity with LIGO gravitational-wave data.
Katherine Freese
Katherine Freese is an American theoretical cosmologist and astroparticle physicist at the University of Texas at Austin, known for natural inflation, dark matter detection, and the book The Cosmic Cocktail.
Katherine Mack
Katherine (Katie) Mack is a theoretical astrophysicist and cosmologist who studies dark matter, wrote The End of Everything, and holds the Hawking Chair at Perimeter Institute.