Interacting galaxies as a research area focuses on the dynamical, hydrodynamical, and radiative processes that occur when galaxies experience mutual gravitational influence, including fly-bys, minor and major mergers, and tidal encounters. Studies combine N-body and hydrodynamical simulations with multiwavelength observations to investigate tidal tails, bridges, bars, and induced starbursts, as well as gas inflows, feedback, and morphological transformation. This field is central to understanding hierarchical structure formation, the build-up of stellar mass, triggering and regulation of active galactic nuclei, and environmental effects on galaxy evolution across cosmic time, often using statistically defined samples from large surveys alongside detailed case studies.
The existence of massive, elliptical galaxies in the early universe has puzzled astronomers for two decades. An international team led by Nikolaus Sulzenauer and Axel Weiß from the Max Planck Institute for Radio Astronomy ...
Astronomy
Feb 10, 2026
0
127
Astronomers at Texas A&M University have discovered a rare, tightly packed collision of galaxies in the early universe, suggesting that galaxies were interacting and shaping their surroundings far earlier than scientists ...
Astronomy
Jan 30, 2026
0
149
A team of astronomers has employed a cutting-edge, artificial intelligence–assisted technique to uncover rare astronomical phenomena within archived data from NASA's Hubble Space Telescope. The team analyzed nearly 100 million ...
Astronomy
Jan 27, 2026
1
84
Some galaxies in the early universe were absolute powerhouses, churning out stars at rates that would dwarf the Milky Way's modest stellar production. These "monster galaxies," buried deep in dust between 10 and 12 billion ...
Astronomy
Jan 26, 2026
0
61
Using the Subaru Telescope's wide-field camera, astronomers have discovered a previously unknown structure surrounding a tiny satellite galaxy of the Milky Way. The newly discovered structure exhibits features resembling ...
Astronomy
Jan 14, 2026
0
40
Mid-infrared observations from NASA's James Webb Space Telescope, shown in white, gray, and red, are combined here with X-ray data from NASA's Chandra X-ray Observatory, highlighted in blue. Together, these different wavelengths ...
Astronomy
Dec 30, 2025
14
354
Astronomers have confirmed the first known triple system in which all three galaxies host actively feeding, radio-bright supermassive black holes.
Astronomy
Dec 24, 2025
1
258
NASA's James Webb Space Telescope captured two nearby dwarf galaxies interacting with each other in this image released on Dec. 2, 2025.
Astronomy
Dec 22, 2025
0
92
Professor Woong-bae Zee of the College of Liberal Studies at Sejong University has revealed that a galaxy does not possess only a single evolutionary pathway; instead, depending on the nature of its neighboring galaxy, it ...
Astronomy
Dec 22, 2025
0
42
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
0
24
