Seyfert galaxies as a research area encompass the systematic study of nearby active galactic nuclei (AGN) characterized by luminous, compact nuclei and strong emission-line spectra, with particular emphasis on type 1 and type 2 Seyfert classifications. Research focuses on accretion onto supermassive black holes, ionized gas kinematics, broad- and narrow-line region structure, and the role of obscuring material within unified AGN models. This field integrates multiwavelength observations (radio to X-ray), spectral diagnostics, variability studies, and high-resolution imaging to constrain black hole mass, accretion rates, feedback processes, and the co-evolution of nuclear activity with host galaxy properties.
Astronomers have spotted many "red and dead" galaxies in the early universe. These are massive systems that stopped forming stars surprisingly early in cosmic history. Now, they may have found evidence of one in the act of ...
For just one day, our dark universe detective, Euclid, turned its gaze toward the light: the extremely bright inner region of our Milky Way galaxy, known as the galactic bulge. This special request came from astronomers who ...
Astronomy
Jun 24, 2026
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Thanks to the X-Ray Imaging and Spectroscopy Mission, or XRISM, University of Michigan researchers are helping chip away at one of astronomy's cosmic mysteries: The universe's most massive galaxies appear to be missing stars.
Astronomy
Jun 16, 2026
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Astronomers monitoring a nearby active galaxy for six years have watched its supermassive black hole dramatically wake up, brightening by a factor of 10 across ultraviolet and X-ray wavelengths. The paper outlining the study ...
The universe is full of fascinating structures, and some of the most striking take shape inside the giant clouds where stars are born. There, streams of gas appear to converge from all directions toward a dense central hub, ...
Astronomy
May 28, 2026
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Astronomers have tracked a dramatic "changing-look" active galactic nucleus (AGN) whose central supermassive black hole appeared to switch off and then rapidly reignite. The galaxy, HE 1237−2252, dimmed in X-rays by a factor ...
When you think of outer space, you're likely picturing stars, planets and moons. But much of space is filled with clouds of gas, plasma and stardust—known as interstellar clouds.
Astronomy
May 13, 2026
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One of the longest stellar dimming events ever observed was likely caused by the gigantic saucer-like rings of either an unseen brown dwarf or "super-Jupiter" blocking its host star's light, astronomers say. For decades, ...
Astronomy
Feb 11, 2026
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Astronomers have obtained the sharpest-ever X-ray spectrum of an iconic active galaxy, providing the most accurate, precise view ever obtained of the extreme relativistic effects imprinted onto the spacetime around a supermassive ...
Astronomy
Jan 5, 2026
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When the James Webb Space Telescope (JWST) began operations, one of its earliest surveys was of galaxies that existed during the very early universe. In December 2022, these observations revealed multiple objects that appeared ...
Astronomy
Oct 18, 2025
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