The Milky Way might be encircled by numerous satellite galaxies that have not yet been discovered. Researchers are employing sophisticated simulations to anticipate the presence of these hidden formations.
Small galaxies that revolve around bigger ones, such as the Milky Way, are known as satellite galaxies. With the help of high-resolution dark matter simulations, scientists believe there may be more than 100 yet-to-be-discovered ones. These possible findings might reinforce the standard model of cosmology.
Dark matter, despite being invisible, is essential in the process of galaxy creation. It constitutes roughly 85% of the universe’s mass. Researchers identify its existence by observing its gravitational influence on celestial bodies and light.
Small galaxies, pulled in by the Milky Way’s gravitational pull, slowly shed their dark matter and stars. This process causes them to become very dim and hard to detect. New advancements such as the Vera Rubin Observatory could soon help uncover them.
The finding of these previously unseen galaxies would mark a success for the ΛCDM model. It would also highlight the effectiveness of predictions derived from the principles of physics and math. Scientists are looking forward to information from upcoming telescopes.
What is dark matter?
Dark matter is an enigmatic material that does not reflect, absorb, or release light, which makes it undetectable by standard telescopes. It can only be identified by the way it influences the gravity of visible objects in space.
Researchers believe that dark matter makes up approximately 85% of the universe’s overall matter. It is essential in the formation and organization of galaxies, serving as a ‘framework’ where ordinary matter gathers.
Although it is plentiful, the precise characteristics of dark matter continue to be one of the biggest enigmas in contemporary cosmology. Scientists are still working to uncover its makeup and features.
Finding more satellite galaxies might offer important insights into how dark matter is spread out and behaves near the Milky Way.
What is the process behind the creation of satellite galaxies?
Satellite galaxies develop inside dark matter halos—large spheres that encircle bigger galaxies such as the Milky Way. These halos serve as ‘nurseries’ for the creation of smaller galaxies.
Over many years, the gravitational force of the main galaxy draws in these smaller galaxies, causing them to eventually revolve around it. This process can span billions of years, during which the smaller galaxies slowly shed their dark matter and stars.
This gravitational interaction accounts for why numerous satellite galaxies are so dim and difficult to observe. Simulations indicate that the Milky Way could contain significantly more than what has been detected so far.
Grasping this process is crucial for verifying existing theories regarding the formation and development of galaxies in the cosmos.
Source: Durham University
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