An amateur astronomer has found a fossilized object from the early universe near the bright Andromeda galaxy.
Giuseppe Donatillo (Giuseppe Donatiello) spotted a very faint dwarf galaxy, now called Pegasus V, in archived data from the US Department of Energy's Dark Energy Camera.
Thus, after learning about his observations, scientists examined the area in the sky more closely with the "Gemini North Telescope" and now think that Pegasus V may be a fossil of the first galaxies, which is full of very old stars. .
- Abdul Rahman Sufi; The discoverer of the Andromeda Galaxy
"Michelle Collins" (Michelle Collins), an astronomer at the University of Surrey in the UK, who was in charge of this study, said: "This is the first time that using an astronomical survey that It wasn't specifically designed for this, a galaxy this faint was discovered around the Andromeda Galaxy.
This galaxy was first detected in data collected by the 4-meter telescope "Vctor M. Blanco". ) was detected in the Inter-American Observatory "Cerro Tololo" (Cerro Tololo) in Chile. Donatillo was part of the Andromeda Dwarf galaxy Search Program led by David Martnez-Delgado of the Astrophysics Institute of Angeles (Astrofsica de Andaluca) in Spain, and his sharp eyes spotted the object.
The Andromeda Galaxy, Messier 31 (M31), a new faint
galaxy nearby It has been discovered.
Credit: Alan Dyer /VW PICS/Universal Images Group via Getty Images
According to scientists, this newly discovered object, which has only very small amounts of heavy elements, should be a The galaxy is old. Finding such a mass is important because astronomers expect there to be many faint galaxies, but in fact very few have been observed so far.
Scientists are still not sure why this discovery gap in the field These dim, fossilized galaxies do exist, though the faint glow certainly makes them hard to spot, even for experts.
If future searches fail, the entire science of astronomy could be in trouble. Researchers from the US National Science Laboratory noted: "If there really are fewer faint galaxies than predicted, this points to a serious problem in astronomers' understanding of cosmology and dark matter."
- The Andromeda Galaxy's halo map was made in great detail
Dark matter is believed to make up a large part of the fundamental structure of the universe, but the challenge For astronomers, its invisibility is the reason for searching with telescopic probes. We can only perceive its existence through gravitational effects on other objects. However, it is hoped that the keen eyes of NASA's James Webb Space Telescope will shed more light on early galaxies.
"This tiny fossil galaxy from the early universe may help us understand how galaxies formed," Collins said. Are they formed and is our understanding of dark matter correct or not?
Cover photo: The dim galaxy Pegasus 5 near the
Credit: International Gemini Observatory/NOIRLab/NSF/AURA Acknowledgment: Image processing: T.A. Rector (University of Alaska Anchorage/NSF's NOIRLab), M. Zamani (NSF's NOIRLab) & D. de Martin (NSF's NOIRLab)