Radio galaxies as a research area focus on extragalactic systems whose active galactic nuclei and associated relativistic jets emit strongly at radio wavelengths, often dominating their bolometric output. This field encompasses the physics of jet launching and collimation from accreting supermassive black holes, particle acceleration, synchrotron and inverse-Compton emission processes, and the interaction of jets and radio lobes with the interstellar and intracluster medium. Research on radio galaxies is central to understanding AGN feedback in galaxy formation and evolution, environmental dependence of radio-loud activity, large-scale magnetic fields, and the use of radio-loud AGN as probes of cosmology and large-scale structure.
European astronomers have conducted optical and radio observations of an enigmatic radio source designated GRS 0917+75. As a result, they found that GRS 0917+75 is a giant radio galaxy and determined its properties. The new ...
Short-lived sources of radio radiation in the sky, known as radio transients, can originate in the vicinity of supermassive black holes in the centers of galaxies. They are the result of processes that take place under extreme ...
Astronomy
Jul 3, 2026
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Astronomers have discovered a "remarkable" bow-and-arrow-shaped radio galaxy with an enormous arc-like structure extending nearly 1.8 million light-years across. The newly identified system, detailed in a new paper published ...
Astronomy
Jun 22, 2026
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Astronomers have identified a possible new member of one of astronomy's strangest classes of objects: Odd radio circles (ORCs), enormous ring-like structures visible only at radio wavelengths. The newly discovered source, ...
The Haystack 37m Telescope has been a landmark in radio astronomy and radar studies of the solar system since its first light in 1964. Over the following four decades, it supported NASA's Apollo landings on the moon, made ...
Astronomy
May 20, 2026
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The twinkling stars in the night sky are not just beautiful to look at. Their flickering reveals something about the varying temperatures and densities in the layers of Earth's atmosphere, which refract the light as it travels ...
Astronomy
May 13, 2026
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Astronomers recently carried out a comprehensive search for strange "winged" radio galaxies using data from the LOFAR Two-meter Sky Survey Data Release 2 (LoTSS DR2) and discovered over 1,000 new systems. The paper outlining ...
Astronomers have discovered an exceptionally rare radio galaxy that has three distinct pairs of radio lobes. This system falls into a subpopulation of radio galaxies known as "triple-double" radio galaxies (TDRGs). Located ...
Some of the universe's most extreme explosions leave behind almost no trace. The original explosion is unseen, but our observations can capture the long-lived echo it leaves behind as the shock front plows into its surrounding ...
Astronomy
Feb 26, 2026
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Spanish astronomers have conducted a near-infrared study of an ultra-high energy gamma-ray source designated LHAASO J2108+5157. The new study, published February 11 on the arXiv preprint server, tries to unravel the mysterious ...
