Galactic archaeology is a research area in astrophysics that reconstructs the formation and evolutionary history of galaxies, particularly the Milky Way, by analyzing the fossil record encoded in their stellar populations. It combines precise stellar kinematics, chemical abundances, ages, and spatial distributions—often derived from large spectroscopic and astrometric surveys—to identify and characterize distinct stellar components, merger remnants, and accretion events. By linking chemo-dynamical substructures to theoretical models of galaxy formation in a cosmological context, galactic archaeology constrains hierarchical assembly histories, star formation and chemical enrichment timescales, and the distribution and evolution of dark matter in galactic halos and disks.
Our home galaxy, the Milky Way, grew to its current size in part by consuming smaller galaxies. Now, new data from NASA's Hubble Space Telescope show definitive evidence of a dwarf galaxy merging with the young Milky Way ...
Astronomy
Aug 17, 2026
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The Sloan Digital Sky Survey V (SDSS-V) has announced its 20th public data release (DR20), delivering a dramatic expansion of the Milky Way Mapper (MWM) scientific survey—the most detailed spectroscopic map yet assembled ...
Astronomy
Aug 6, 2026
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Amina Helmi's passion for the Milky Way is clear as soon as one steps into her small office at the University of Groningen, in the north of the Netherlands.
Astronomy
Jul 30, 2026
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In new images from NASA's James Webb Space Telescope to celebrate its fourth science anniversary, a familiar galaxy transforms into something far richer and far more complex than ever seen before. Webb's unprecedented sensitivity ...
Astronomy
Jul 6, 2026
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An international team of astronomers has used the James Webb Space Telescope (JWST) and a natural phenomenon known as gravitational lensing to achieve a definitive characterization of LAP1-B, an ultra-faint galaxy from 13 ...
Astronomy
Jun 26, 2026
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Just a few hundred million years after the Big Bang, the universe was a dark and simple place. There were no galaxies like the Milky Way, no planets, and no heavy elements such as carbon or oxygen. Instead, vast clouds of ...
Astronomy
Jun 22, 2026
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Astronomers may have uncovered new details about one of the Milky Way's most important ancient collisions. Using data from the Dark Energy Spectroscopic Instrument (DESI) and a new clustering algorithm, researchers have found ...
No matter the time or vantage point, from a pre-Neolithic cave to a post-lockdown London high-rise, the predictability of the night sky has always been humanity's symbol of permanence and reassuring stability.
Astronomy
Jun 10, 2026
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The Milky Way galaxy grew into its current form with the help of smaller galaxies over time, which it has "consumed" or merged with. Astronomers are able to pick out which stars in the Milky Way came from other galaxies by ...
How far the Milky Way's disk extends has long been difficult to define—it doesn't end sharply, but fades away gradually at its outer edges. Now, for the first time, an international team of astronomers has identified the ...
Astronomy
Apr 21, 2026
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