https://phys.org/space-news/astronomy/ en-us The latest science news on astronomy, space, and astrophysics. The Sloan Digital Sky Survey V (SDSS-V) has announced its 20th public data release (DR20), delivering a dramatic expansion of the Milky Way Mapper (MWM) scientific survey—the most detailed spectroscopic map yet assembled of stars in and around our home galaxy. https://phys.org/news/2026-08-galaxy-milky-mapper-survey-latest.html Astronomy Thu, 06 Aug 2026 18:30:01 EDT news705257521 A team of astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) has captured a massive stream of gas—one trillion miles, or 0.2 light-years, long—feeding the young triple-star system GW Orionis. These new observations provide the clearest evidence yet for how such "streamers" can tilt and twist the disks where planets are born. The findings are published in The Astronomical Journal. https://phys.org/news/2026-08-trillion-mile-gas-streamer-tilt.html Astronomy Thu, 06 Aug 2026 17:00:07 EDT news705248521 Understanding the formation and evolution of the centers of galaxies is one of the most intriguing challenges in astrophysics. The new study aims to unveil the physical processes that led to the formation of two striking features surrounding the black holes at the centers of most galaxies: nuclear star clusters and nuclear stellar disks. Only in the last decade have such galactic structures been observed in the Milky Way and extragalactic systems. https://phys.org/news/2026-08-milky-simulation-reveals-central-galactic.html Astronomy Thu, 06 Aug 2026 16:40:01 EDT news705248221 Narrow jets of luminous matter may be emitted toward Earth from the nuclei of active galaxies billions of light-years away. The galaxy then appears as a point source and is called a blazar. A Polish-German team of scientists has, for the first time, analyzed the activity of one such blazar over an extended period and, instead of finding answers, encountered an ever-increasing number of intriguing questions. https://phys.org/news/2026-08-decades-blazar-mysteries-piling.html Astronomy Thu, 06 Aug 2026 16:00:05 EDT news705241262 A new study analyzing the James Webb Space Telescope (JWST) spectra of more than 1,400 galaxies suggests a surprisingly small group of "leaky" galaxies was responsible for cosmic reionization. The paper outlining this work was posted to the arXiv preprint server on July 24. https://phys.org/news/2026-08-jwst-leaky-galaxies-reionized-early.html Astronomy Thu, 06 Aug 2026 14:40:04 EDT news705228602 Astronomers may have just confirmed one of the quirkiest aspects of quantum mechanics: that seemingly empty space can alter the behavior of light. This phenomenon, called "vacuum birefringence," was first predicted nearly 90 years ago by Werner Heisenberg, one of the founding fathers of quantum mechanics. He suggested that even a perfect vacuum should be teeming with "virtual particles" that rapidly pop in and out of existence. https://phys.org/news/2026-08-rare-ultra-magnetic-star-key.html Astronomy Thu, 06 Aug 2026 10:20:06 EDT news705226981 High-energy particles in Earth's radiation belt can appear to spread out randomly, even when they are moving in a "predictable" way. This is because spacecraft observations naturally blur the fine-scale structure of the particle population, a new study reveals. https://phys.org/news/2026-08-spacecraft-conceal-particles-earth-space.html Astronomy Thu, 06 Aug 2026 09:20:06 EDT news705226201 This composite of seven images from the Mastcam-Z instrument aboard NASA's Perseverance Mars rover shows Earth, visible as a small bright dot moving from upper left to lower right, passing behind the Martian moon Phobos on July 2, 2026, the 1,907th Martian day, or sol, of the mission. https://phys.org/news/2026-08-nasa-perseverance-captures-phobos-earth.html Astronomy Thu, 06 Aug 2026 09:20:05 EDT news705219842 Researchers from Kyushu University have discovered that diffuse gas surrounding dense filaments in a nearby stellar nursery plays a much larger role in star formation than previously recognized. By tracking the movement of gas in the Monoceros R2 hub–filament system, the team found that low-density gas contributes to hub growth both through direct inflow and by replenishing nearby dense filaments. Their findings show that overlooking this diffuse gas could substantially underestimate the amount of material available to build massive stars. https://phys.org/news/2026-08-diffuse-inter-filament-gas-key.html Astronomy Wed, 05 Aug 2026 17:20:04 EDT news705159122 Black holes are fascinating regions in space where gravity is so strong that nothing, even light, can escape them. The largest known black holes, called supermassive black holes, contain millions to billions of times the mass of the sun and are typically located at the centers of galaxies. https://phys.org/news/2026-08-runaway-supermassive-black-hole-rbh.html Astronomy Wed, 05 Aug 2026 15:20:03 EDT news705145331 Astronomers have speculated about the mysterious "little red dots" seen through the James Webb Space Telescope's images of the early universe: They could be galaxies, black holes, quasi-stars, starbursts ... or something else entirely. https://phys.org/news/2026-08-red-dots-pulsating-monster-stars.html Astronomy Wed, 05 Aug 2026 14:40:01 EDT news705151083 Using observations from multiple powerful telescopes, a team of astronomers studied a red quasar nicknamed "the Hatchling" at redshift 3.7. They may have identified one of the clearest examples yet of a quasar caught in transition between a heavily obscured and fully exposed phase. https://phys.org/news/2026-08-astronomers-hatchling-quasar-dusty-cocoon.html Astronomy Wed, 05 Aug 2026 14:20:04 EDT news705154659 In March 2026, the Einstein Probe detected a brief flash of soft X-rays emitted from a galaxy about 500 million light-years away. The flash, dubbed EP260321a, immediately triggered a worldwide observing campaign. Within an hour, ground-based telescopes began monitoring the source, revealing a rapidly brightening supernova, later designated SN 2026gzf. Two teams of scientists used several NSF NOIRLab facilities to observe the event and monitor its evolving light profile. https://phys.org/news/2026-08-astronomers-massive-star-death-explosive.html Astronomy Wed, 05 Aug 2026 11:40:01 EDT news705057700 Using continuous imagery from NASA's PUNCH (Polarimeter to Unify the Corona and Heliosphere) mission, scientists predicted the near-Earth arrival of a solar eruption to within 30 minutes in an initial proof-of-concept test. The results, presented Tuesday at the Committee on Space Research Scientific Meeting and under review at the journal Space Weather, could revolutionize the way Earth-impacting storms are forecast. https://phys.org/news/2026-08-nasa-sharpens-solar-storm.html Astronomy Tue, 04 Aug 2026 17:10:03 EDT news705080161 The space around Earth is becoming increasingly crowded, with thousands of satellites and pieces of debris now sharing low Earth orbit. Even above this region—at altitudes of several hundred kilometers—the extremely thin upper atmosphere can slow satellites, making accurate information on atmospheric density essential for predicting satellite motion and preventing collisions. https://phys.org/news/2026-08-upper-atmosphere-starlink-satellite.html Astronomy Tue, 04 Aug 2026 15:10:02 EDT news705074281 Data released by the Sloan Digital Sky Survey (SDSS) marks a landmark expansion in the study of accreting supermassive black holes (SMBHs). As part of the fifth generation of the survey (SDSS-V), the Black Hole Mapper (BHM) program is providing unprecedented insights into the masses, growth and physics of quasars and active galactic nuclei (AGN) across cosmic time. https://phys.org/news/2026-08-monsters-unveils-sky-views-supermassive.html Astronomy Tue, 04 Aug 2026 13:00:05 EDT news705061622 A new Vera C. Rubin Observatory image featuring hundreds of thousands of distant galaxies in and around the COSMOS field marks the observatory's first LSST Camera image and catalog release for science. https://phys.org/news/2026-08-rubin-observatory-deep-window-famous.html Astronomy Mon, 03 Aug 2026 17:40:04 EDT news704991967 So far, almost all stellar-mass black holes detected by astronomers have been found in binary systems. However, astronomers have long suspected that these binary black holes are the exception and that, within the Milky Way, most exist on their own. https://phys.org/news/2026-08-simulations-hint-hidden-population-companionless.html Astronomy Mon, 03 Aug 2026 15:20:07 EDT news704973799 Roll back the tape of Earth's history, and geologists and astrobiologists remain perplexed about the environmental conditions on early Earth. That's because conventional pathways for understanding Earth's history have been lost to time owing to the planet's active geology and atmospheric weathering. https://phys.org/news/2026-08-astrobiologist-apollo-lunar-samples-mirror.html Astronomy Mon, 03 Aug 2026 15:00:07 EDT news704981462 Since 2016, an ordinary-looking F-type star called KIC 8462852, nicknamed Tabby's star, has behaved anything but ordinarily. In a new study published in the Monthly Notices of the Royal Astronomical Society on July 6, researchers revisited this star to find out what is really causing its irregular dimming. https://phys.org/news/2026-07-hour-dip-tabby-star-decade.html Astronomy Mon, 03 Aug 2026 08:00:05 EDT news704472236 We have known for a while that the Milky Way is full of homeless worlds. Rogue planets, free-floating planets—call them what you like—but they are planets formed in orderly systems around ordinary stars and then thrown out, either by a gravitational shove from a sibling planet or by a star that strayed too close. What has been much less clear is what happens to any moons they were carrying at the time. Eviction is a violent business, and you would expect a moon to be the first thing lost. https://phys.org/news/2026-08-moon-planet-stolen.html Astronomy Mon, 03 Aug 2026 08:00:03 EDT news704957222 Using the James Webb Space Telescope (JWST), astronomers obtained high-contrast coronagraphic images of the protoplanetary disk around the young, nearby star TW Hydrae. Results of the observational campaign, published July 27 on the preprint server arXiv, shed more light on the nature of this disk. https://phys.org/news/2026-07-webb-reveals-warped-nearby-tw.html Astronomy Sun, 02 Aug 2026 13:20:01 EDT news704715812 Using spectral data from the Dark Energy Spectroscopic Instrument (DESI), astronomers have gained some of the clearest evidence yet that white dwarf stars are accreting debris from disintegrating exoplanets. Captured while DESI was unable to study its primary targets: distant galaxies, the results provide unprecedented insights into the chemical makeup of rocky exoplanets, revealing compositions remarkably similar to the planets and asteroids of our own inner solar system. https://phys.org/news/2026-07-desi-side-reveals-spectra-disintegrated.html Astronomy Sun, 02 Aug 2026 08:20:01 EDT news704452570 The German eROSITA consortium (eROSITA-DE), which includes the University of Bonn and is led by the Max Planck Institute for Extraterrestrial Physics (MPE), has released its second major public data set, the "eROSITA Data Release 2" (DR2). https://phys.org/news/2026-07-homing-ray-sky-erosita.html Astronomy Fri, 31 Jul 2026 16:20:01 EDT news704722981 Every night, astronomers must carefully assess changing weather, the intensity of moonlight and shifting atmospheric conditions before deciding where to point a telescope. It's a constant balancing act designed to squeeze as much science as possible from every precious hour beneath dark skies. Now, Northwestern University, University of Chicago and Fermilab scientists have developed a new artificial intelligence (AI) tool that automatically determines where a telescope should point. https://phys.org/news/2026-07-ai-driven-telescope-stargazing.html Astronomy Fri, 31 Jul 2026 10:40:03 EDT news704707321 Researchers have obtained the deepest images ever taken of IC 1101, allowing them to identify the galaxy's outer edge for the first time. The observations confirm it as the largest known galaxy, spanning roughly 520 kiloparsecs, or about 1.7 million light-years, and containing an estimated 3.4 trillion solar masses in stars. The paper was posted to the arXiv preprint server on July 16. https://phys.org/news/2026-07-astronomers-full-size-largest-galaxy.html Astronomy Fri, 31 Jul 2026 08:40:07 EDT news704457789 The formation and evolution of individual stars in a galaxy shape the evolution of the galaxy itself. Stars and stellar remnants make up the vast majority of a galaxy's mass, so it's not surprising that the stellar population affects the evolution of galaxies. In the Milky Way's disk and bulge, stars and dead stars make up about 85% of the baryonic mass. https://phys.org/news/2026-07-probing-binary-stars-small-magellanic.html Astronomy Thu, 30 Jul 2026 21:40:01 EDT news704622188 There's a nice kind of irony buried in this story: One of the most sensitive instruments ever built, capable of measuring distortions smaller than the width of a proton, has been quietly held back by something as mundane as heat. And the fix, it turns out, is not some exotic new sensor but a thermal camera you could genuinely buy off the shelf. https://phys.org/news/2026-07-thermal-camera-ligo.html Astronomy Thu, 30 Jul 2026 19:20:01 EDT news704621648 Black holes are often portrayed as cosmic gluttons that swallow everything that comes too close. But new observations of a dramatic black hole outburst—led by Warwick Postdoctoral Fellow Dr. Noel Castro Segura—suggest the reality is much messier. https://phys.org/news/2026-07-black-hole-frenzy-lingering-cosmic.html Astronomy Thu, 30 Jul 2026 15:40:05 EDT news704639281 In this July 6, 2026, image, NASA's James Webb Space Telescope's Mid-Infrared Instrument (MIRI) reveals the nearby galaxy Centaurus A, exposing the dusty structures and hidden activity that shape this unusual system. https://phys.org/news/2026-07-image-starburst-galaxy-centaurus.html Astronomy Thu, 30 Jul 2026 15:20:04 EDT news704633740