A spiral galaxy 45 million light-years from Earth has had its brilliant heart laid bare in a new image from NASA’s James Webb Space Telescope, released this week.
The galaxy, cataloged as Messier 77 and located in the constellation Cetus — the whale — has long been studied by astronomers because it hosts one of the brightest and most accessible active galactic nuclei, or AGN, in the nearby universe. What sets Webb’s new image apart is the mid-infrared view, which cuts through much of the surrounding dust that obscures visible-light telescopes and isolates the core’s intense radiation output.
At the center of that nucleus sits a supermassive black hole some 8 million times more massive than the sun, NASA reported. The black hole’s enormous gravitational pull drags surrounding gas into a tight orbit, where friction and compression heat the material to such extremes that it blazes across the electromagnetic spectrum. Webb’s Mid-Infrared Instrument, or MIRI, captured the resulting glow with a resolution that ground-based observatories and earlier space telescopes could not match.
The image was one of the latest in a steady stream of observations from Webb since the $10 billion observatory launched in December 2021 and began returning science images in the summer of 2022. As the largest and most powerful space telescope ever built, Webb is designed to peer deeper into the infrared universe than its predecessor, the Hubble Space Telescope, revealing phenomena that are too cool, too distant, or too dust-shrouded for other instruments to detect.
Active galactic nuclei like the one in Messier 77 are laboratories for understanding how black holes interact with their host galaxies. The energy released by the infalling gas can, in some cases, drive outflows that shape star formation across the entire galaxy — a feedback loop that astronomers are still working to fully characterize. Webb’s mid-infrared sensitivity is tailored to that task, capturing the heat signature of the accreting gas directly rather than inferring it from less direct methods.
Messier 77 itself was first cataloged by the French astronomer Pierre Méchain in 1780 and later included in Charles Messier’s famous list of comet-like objects. It has been imaged by telescopes from the ground and in orbit for more than a century, but the Webb portrait represents a step change in clarity for the infrared band where the galaxy’s most energetic engine does its work.
NASA said Webb’s science team will continue using the observatory to survey active galactic nuclei across a range of distances and galaxy types, building a broader census of how supermassive black holes influence their cosmic neighborhoods. The telescope is managed by NASA in partnership with the European Space Agency and the Canadian Space Agency, and its science operations are conducted by the Space Telescope Science Institute in Baltimore.