Dwarf irregular galaxies as a research area encompasses the observational and theoretical study of low-mass, gas-rich, morphologically irregular galaxies that lack coherent spiral structure or pronounced bulges. This field investigates their star formation histories, feedback-regulated interstellar medium, chemical enrichment, dark matter content, and kinematics, often using multiwavelength photometry, spectroscopy, and high-resolution simulations. Research focuses on their role as laboratories for low-metallicity star formation, constraints on cosmological galaxy formation models, and probes of reionization-era analogs. It also examines environmental effects, such as tidal interactions and ram-pressure stripping, on their evolution within groups and clusters.
This NASA Hubble Space Telescope image features the dwarf irregular galaxy ESO 490-017, roughly 12,000 light-years in diameter and some 23 million light-years away in the constellation Canis Major. The galaxy's low surface ...
Astronomy
May 27, 2026
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Ultra-faint dwarf galaxies—tiny satellite galaxies orbiting the Milky Way—have long been seen as cosmic fossils. Now, a new study published today in Monthly Notices of the Royal Astronomical Society uses an unprecedented ...
Astronomy
Apr 23, 2026
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One of the things astronomers find when they look around at galaxies is a correlation between a galaxy's mass and the mass of its supermassive black hole. Contrary to popular belief, these SMBH don't anchor their galaxies; ...
Astronomy
Mar 29, 2026
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Using NASA's James Webb Space Telescope, astronomers have spotted two rare kinds of dust in the dwarf galaxy Sextans A, one of the most chemically primitive galaxies near the Milky Way.
Astronomy
Jan 6, 2026
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This NASA/ESA Hubble Space Telescope image features a glittering blue dwarf galaxy called Markarian 178 (Mrk 178). The galaxy, which is substantially smaller than our own Milky Way, lies 13 million light-years away in the ...
Astronomy
Dec 15, 2025
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The Large and Small Magellanic Clouds are irregular dwarf galaxies and satellites of the Milky Way. The LMC is about 163,000 light-years away and the SMC is about 206,000 light-years away, and their close proximity makes ...
Astronomy
Dec 14, 2025
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Galaxies like our Milky Way grew through cascading mergers of smaller galaxies that began billions of years ago. The ancient progenitors of galaxies like ours were small galaxies similar to modern-day dwarf galaxies like ...
Astronomy
Dec 3, 2025
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An international team of researchers led by the Leibniz Institute for Astrophysics Potsdam (AIP) has shed light on a decades-long debate about why galaxies spin faster than expected—and whether this behavior is caused by ...
Astronomy
Oct 27, 2025
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Astronomers from South Africa have conducted multi-band observations of a nearby dwarf irregular galaxy known as UGCA 320. Results of the observational campaign, recently published on the arXiv preprint server, yield important ...
A cosmic dance could be the future of the Milky Way as it tracks a course to collide with neighboring galaxies, a University of Queensland survey has found. The paper is published in the Monthly Notices of the Royal Astronomical ...
Astronomy
Aug 11, 2025
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