The exact number of dark matter galaxies in the universe is uncertain and difficult to determine. Dark matter itself is a mysterious and elusive substance that does not interact directly with light or electromagnetic radiation, making it challenging to observe and study.
Galaxies are typically composed of both ordinary matter (stars, gas, and dust) and dark matter. It is believed that dark matter plays a crucial role in the formation and evolution of galaxies, providing the gravitational scaffolding that enables their structure and stability. However, because dark matter cannot be directly detected, its distribution within galaxies is inferred through its gravitational effects on visible matter.
Current astronomical observations and simulations suggest that dark matter is more abundant than ordinary matter in the universe, with a significant influence on galaxy formation. Estimates indicate that the majority of the mass within galaxies is composed of dark matter, and it is thought to be present in most, if not all, galaxies.
The exact number of dark matter galaxies is challenging to determine because we rely on indirect observations and theoretical models to study them. As our understanding of dark matter and its distribution improves through ongoing research and technological advancements, we may gain a better understanding of the prevalence and characteristics of dark matter galaxies in the universe.