A recent image from the James Webb Space Telescope showcases an extraordinary nearby galaxy known as Messier 77, or the Squid Galaxy. Located about 45 million light-years away in the constellation Cetus, this barred spiral galaxy stands out due to its bright center, driven by a supermassive black hole. This black hole is a colossal eight million times more massive than our Sun, drawing in massive amounts of material. As this matter spirals inward, it heats up, creating a dazzling glow that outshines the entire galaxy.
By comparison, our own Milky Way features a supermassive black hole called Sagittarius A*, but it isn’t actively consuming enough matter to be categorized as an active galactic nucleus like Messier 77.
The new Webb image, taken with the Mid-Infrared Instrument, also unveils the previously unseen central bar of the Squid Galaxy. This bar is packed with stars and divides the outer spiral arms. Surrounding it is a bright starburst ring, where a flurry of new stars is being born. The Webb telescope excels in exploring the galaxy’s cooled dust and gas, highlighting these features in blue.
One striking aspect of the image is the bright orange lines extending from the galaxy’s center. These are known as diffraction spikes, a result of the telescope’s imaging technique, not actual structures within the galaxy.
Despite its proximity, the Squid Galaxy holds several mysteries. Astronomers are curious why this black hole emits little in the way of gamma rays—usually a hallmark of such cosmic entities—yet it produces a high number of neutrinos, often dubbed “ghost particles.”
According to a recent study, almost 20% of galaxies have active galactic nuclei like Messier 77. The insights we gain from examining such galaxies deepen our understanding of the universe and the mechanisms at play within these colossal systems.
For those interested in exploring this further, you can check out more about Messier 77 and its unique features on the James Webb Space Telescope’s official site.
