The National Aeronautics and Space Administration (NASA) has released a striking new image of the spiral galaxy Messier 77, captured by the James Webb Space Telescope. The galaxy, also known as M77, is located approximately 45 million light-years away in the constellation Cetus and is among the most extensively studied barred spiral galaxies in deep space. The new infrared observations provide an unprecedented level of detail, revealing both its structure and intense central activity.
At the heart of M77 lies an active galactic nucleus (AGN), a highly energetic region powered by a supermassive black hole estimated to be around eight million times the mass of the Sun. According to scientists, this central region is surrounded by rapidly orbiting gas that heats up due to extreme gravitational forces, emitting intense radiation that outshines the rest of the galaxy. The observations made by the James Webb Space Telescope highlight this energetic core in remarkable clarity using its Mid-Infrared Instrument (MIRI).
The image also reveals unusual bright streaks extending outward from the galaxy’s core. Scientists explained that these are not physical structures within the galaxy but optical diffraction spikes created when extremely bright light from the AGN interacts with the telescope’s mirror design. The pattern, which appears as a six-plus-two-pointed star-like structure, is a known effect seen in high-resolution space imaging when observing extremely luminous cosmic sources.
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Beyond its active core, M77 is also a strong star-forming galaxy. Webb’s observations show a prominent bar structure running through its centre, surrounded by a vivid “starburst ring” where new stars are forming at a rapid rate. This ring spans over 6,000 light-years and appears as dense clusters of glowing gas and dust, marking one of the most active stellar nurseries in the nearby universe. Astronomers consider M77 a key reference point for understanding how galaxies evolve and form stars over time.
The galaxy’s disc is filled with swirling clouds of gas and dust, captured in fine detail by the infrared capabilities of the James Webb Space Telescope. These structures appear as smoky filaments and glowing cavities, where new star clusters are emerging. Along the spiral arms, bright orange regions indicate active star formation, while blue-toned areas represent interstellar dust illuminated by surrounding radiation.
In its outer regions, M77 features faint hydrogen gas structures extending far beyond the main disc, forming delicate filaments that stretch into intergalactic space. These extended features, combined with its complex inner structure, have led astronomers to sometimes refer to M77 as the “Squid Galaxy” due to its tentacle-like appearance. The latest image from NASA continues to deepen scientific understanding of how galaxies like M77 evolve, interact, and sustain intense star-forming activity across cosmic timescales.
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