the existence of planets made entirely out of dark matter is purely speculative. Dark matter is a hypothetical form of matter that does not interact with electromagnetic radiation and has not been directly detected so far. It is inferred through its gravitational effects on visible matter and the structure of the universe.
However, if we were to speculate on the characteristics of planets made entirely out of dark matter, we would have to consider the properties and behavior of dark matter as we currently understand it:
Invisible and non-interacting: Dark matter does not interact with electromagnetic radiation, which means it does not emit, reflect, or absorb light. Consequently, a dark matter planet would be completely invisible to telescopes and other instruments that rely on detecting light.
Gravity-based interactions: Dark matter interacts gravitationally with ordinary matter, which is why its presence can be inferred through its gravitational effects. A dark matter planet would possess significant gravitational pull, influencing the motion of nearby celestial objects.
Stable structure: Dark matter is believed to form large-scale structures in the universe, such as dark matter halos around galaxies. A planet made entirely of dark matter would likely have a stable, coherent structure, influenced by the gravitational interactions within its mass.
No nuclear fusion: Dark matter is not expected to participate in nuclear fusion reactions, which are responsible for the energy output of stars. Therefore, a dark matter planet would not generate its own light or heat through nuclear processes.
Unknown internal dynamics: Dark matter's specific properties and behavior remain largely unknown. It is unclear how dark matter interacts with itself and what internal processes, if any, could occur within a dark matter planet.
It's important to note that these characteristics are speculative and based on our current understanding of dark matter. As scientific knowledge evolves and new discoveries are made, our understanding of dark matter and its potential manifestations, including hypothetical dark matter planets, may change.