Published On 1/6/2026
|
Last update: 6/3/2026 11:40 (Mecca time)
The astronomical community witnessed widespread interest after the publication of the most accurate image taken so far of the Sombrero Galaxy, also known as Messier 104, as new observations revealed never-before-seen details about the galaxy’s external structure and evolutionary history.
This image was made using the Dark Energy Camera, one of the most powerful astronomical cameras in the world, mounted on the 4-meter Victor Blanco telescope at the US-Chilean Cerro Tololo Observatory in Chile.
New data indicates that behind its familiar appearance, this famous galaxy hides a more violent and complex history than scientists had thought for many decades.
Read also
list of 2 itemsend of list
A famous galaxy hides a world much larger than what we see
The Mexican Hat Galaxy is located about 30 million light-years from Earth in the constellation Virgo, and is one of the most photographed and studied galaxies in the sky. It gained its name because of its bright central bulge and the surrounding dark dust belt, which gives it a shape resembling a traditional Mexican hat, the sombrero.
Although many telescopes, including the Hubble Space Telescope and the James Webb Space Telescope, have previously studied this galaxy, images of the new Dark Energy Camera revealed that its true size is much larger than the known bright part.
The images showed the presence of a massive outer stellar atmosphere that extends far into space and includes groups of faint stars that are difficult to observe by traditional means. This means that what appeared to be a relatively compact galaxy is only the brightest part of a much larger cosmic structure.
A giant stellar halo reveals traces of an ancient merger
The most prominent thing revealed by the new image is the presence of a bright halo extending to more than three times the apparent width of the galaxy. According to researchers at the National Optical and Infrared Astronomy Laboratory (NOIRLab), this is the first time this halo has been observed at this level of detail and on such a large scale.
The camera also detected a huge stellar stream extending from the southern side of the galaxy. This stream is believed to consist of stars that were gravitationally plucked from a smaller galaxy during a galaxy merger or ingestion that occurred billions of years ago. These remains represent a preserved historical record of the events that the galaxy went through. By studying the distribution of these stars and their chemical composition, scientists can reconstruct stages of the galaxy’s history that cannot be observed directly.
Evidence of a violent past and long-term development
The new discoveries support the idea that the Mexican Hat Galaxy did not evolve quietly, but rather experienced a series of interactions and mergers with smaller galaxies during its long history. Such mergers are among the most important processes responsible for the growth of galaxies in the universe, as gravitational tidal forces tear apart small galaxies and redistribute their stars across vast distances.
These results may also help explain the huge number of globular clusters contained in the galaxy. Astronomers estimate that the Mexican Hat Galaxy contains about 2,000 globular clusters, compared to only about 150 clusters in our galaxy, the Milky Way. Researchers believe that repeated mergers contributed to increasing this number by bringing in additional clusters of galaxies that were swallowed.
This new image confirms that the most famous astronomical objects are still able to surprise scientists, and that modern technologies continue to reveal hidden layers of the history of the universe, hidden in faint stellar halos and traces of collisions that occurred billions of years ago.
