Tidal tails as a research area focus on the formation, dynamics, and evolution of elongated stellar and gaseous structures produced by gravitational interactions between galaxies. This field investigates how tidal forces during close encounters or mergers redistribute baryonic and dark matter, trigger star formation, and modify angular momentum and orbital configurations. Researchers use N-body and hydrodynamical simulations, deep imaging, and spectroscopic observations to constrain interaction histories, mass distributions, and environmental effects in galaxy groups and clusters. Studies of tidal tails also inform models of hierarchical structure formation, the buildup of stellar halos, and the identification of merging systems across cosmic time.
Astronomers may have uncovered a hidden supermassive black hole inside the famous Antennae galaxies NGC 4038/4039, a pair of colliding galaxies best known for their spectacular bursts of star formation. The paper outlining ...
Stellar streams are trails of stars that astronomers can study to solve mysteries about the history of our Milky Way galaxy and, potentially, the dark matter that helps shape the cosmos despite eluding direct observation. ...
Astronomy
Mar 23, 2026
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A recently detected flash of energy appears to have emanated from the wreckage of colliding galaxies, according to an international team of astronomers led by Penn State scientists. The burst, known as GRB 230906A, was likely ...
Astronomy
Mar 10, 2026
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Astronomers from the National Astronomical Observatory of Japan (NAOJ) and elsewhere have used the Subaru Telescope to perform deep imaging observations of a distant globular cluster known as NGC 5466. The observational campaign ...
In a paper published in The Astrophysical Journal Letters, the international LIGO-Virgo-KAGRA Collaboration reports on the detection of two gravitational wave events in October and November of 2024 with unusual black hole ...
Astronomy
Oct 28, 2025
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Astrophysicists from Keele University, alongside an international research team supported by NASA, detected large complex organic molecules in ices outside the Milky Way for the first time—offering a glimpse into the chemistry ...
Astronomy
Oct 20, 2025
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Throughout cosmic evolution, although dwarf galaxies are individually small, they are numerous and serve as the fundamental building blocks shaping the large-scale structure of today's universe. These small galaxies are also ...
Astronomy
Jul 22, 2025
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By analyzing the data from the Dark Energy Camera Legacy Survey (DECaLS), astronomers have discovered a new tidal tail likely associated with the galaxy NGC 3785. The newly detected tidal tail is extremely extended and faint. ...
By analyzing the data from various astronomical surveys, astronomers have investigated an old globular cluster known as NGC 288. As a result, they detected multiple extended tidal tails associated with this cluster. The finding ...
