Webb reveals the stellar lifecycle of NGC 5134 in unprecedented detail

A new image from the NASA/ESA/CSA James Webb Space Telescope, released on February 20, 2026, offers a vivid and scientifically rich portrait of NGC 5134, a spiral galaxy located 65 million light-years away in the constellation Virgo. The image is more than a striking visual: it is a snapshot of the continuous cycle of stellar birth, life, and death that governs the evolution of galaxies across the universe.

A Galaxy Close Enough to Read

Sixty-five million light-years may sound like an immense distance — and it is. The light Webb collected to build this image has been traveling toward us since around the time the non-avian dinosaurs went extinct on Earth. Yet in cosmological terms, NGC 5134 is a near neighbor. That proximity is precisely what makes it scientifically valuable: at this distance, Webb can resolve structures within the galaxy’s spiral arms at a level of detail that becomes impossible for more remote galaxies.

The image was constructed by combining data from two of Webb’s core instruments, each sensitive to a different slice of the infrared spectrum. Their outputs, overlaid and processed together, produce a portrait of the galaxy that captures both its stellar population and the interstellar material threading through it.

Two Instruments, Two Windows into the Galaxy

Webb’s Mid-Infrared Instrument (MIRI) is sensitive to the thermal emission produced by warm dust embedded in interstellar clouds. In the NGC 5134 image, MIRI traces the clumps and filamentary strands of dusty gas that wind through the galaxy’s disk in sweeping arcs, glowing in shades of red and orange. Some of that dust is composed of polycyclic aromatic hydrocarbons (PAHs) — complex organic molecules built from interconnected rings of carbon atoms that are widespread throughout the interstellar medium. PAHs serve as tracers for star-forming regions, because they are excited and rendered luminous by ultraviolet radiation from young, massive stars. Mapping their distribution across a galaxy’s arms therefore maps where the next generation of stars is being assembled.

Webb’s Near Infrared Camera (NIRCam), meanwhile, captures shorter-wavelength infrared light predominantly emitted by stars and star clusters. In the composite image, NIRCam data renders the stellar population of NGC 5134’s disk in a faint, pervading blue glow, punctuated by brighter knots where clusters of stars are concentrated along the spiral arms. At the galaxy’s core, a compact blue-white nucleus stands out sharply against the surrounding structure.

Birth, Death, and Recycling

What the combined image reveals, at its core, is a galaxy in constant ebb and flow. The gaseous clouds billowing through NGC 5134’s spiral arms are active stellar nurseries where gravitational collapse is driving the formation of new stars. Each star that forms draws from the galaxy’s reservoir of star-forming gas, depleting it incrementally over time.

But stars also give back. When they die, they return a portion of their mass to the interstellar medium — though the manner and scale of that return depends heavily on stellar mass.

The most massive stars, those exceeding roughly eight times the mass of the Sun, end their lives catastrophically in supernova explosions. These events release enormous quantities of energy and eject processed stellar material across distances of hundreds of light-years, enriching the surrounding gas with heavy elements and seeding the interstellar medium with the raw material for future stellar generations. In the image, some of the irregular cavities and holes visible within the dusty disk of NGC 5134 are likely the signatures of this kind of stellar feedback: regions where supernova shockwaves have blown the surrounding gas outward, carving openings in the dust.

Stars more similar in mass to the Sun follow a quieter trajectory. As their core hydrogen is exhausted, they expand into red giants, swelling to many times their original size before shedding their outer atmospheres into the interstellar medium as planetary nebulae. The material dispersed this way, while far less violent than a supernova, contributes continuously to the chemical and physical evolution of the galaxy.

A Local Laboratory for Distant Galaxies

One of the most significant applications of observations like this one goes beyond NGC 5134 itself. The galaxy’s relative proximity means that astronomers can study its internal structure — individual star-forming regions, dust morphology, stellar cluster populations — at a resolution that is simply unavailable for more distant galaxies. That detailed understanding can then be calibrated and applied to galaxies that lie too far away for Webb to resolve in the same way, appearing in the background of this very image as barely resolved smudges of light.

This is the underlying logic of programs like PHANGS (Physics at High Angular resolution in Nearby GalaxieS), a large international collaboration involving more than 150 astronomers, which has used Webb along with the Hubble Space Telescope, the Very Large Telescope, and the Atacama Large Millimeter/submillimeter Array to build a comprehensive multiwavelength picture of nearby spiral galaxies. NGC 5134 fits squarely within this framework.

What Webb Keeps Demonstrating

Images like this one are a reminder of what Webb does that no previous telescope could: it pierces through the dust that obscures galaxies in visible light, revealing the warm structures embedded within, while simultaneously capturing the starlight that traces the galaxy’s mass and history. The combination of MIRI and NIRCam in a single observation offers a level of physical completeness that opens new avenues in galactic astrophysics — not just for individual showcase images, but as a systematic tool for understanding how galaxies build themselves over cosmic time.

NGC 5134 is, in this sense, more than a beautiful spiral galaxy 65 million light-years away. It is a laboratory, a reference point, and a demonstration of what the universe looks like when we finally have instruments sharp enough to read it clearly.

Image credit: ESA/Webb, NASA & CSA, A. Leroy