The phenomenon of time dilation near massive objects, as described by general relativity, does not directly imply that our inability to observe dark matter is due to time dilation between our frame and the dark matter's frame.
Dark matter is a hypothetical form of matter that does not interact with light or other electromagnetic radiation. Its existence is inferred from its gravitational effects on visible matter and the structure of the universe. The precise nature of dark matter and its interactions with the known forces of nature are still under investigation.
While general relativity predicts that the presence of massive objects can cause time dilation, this effect primarily applies to regions of strong gravitational fields. Dark matter, being a form of matter that does not interact electromagnetically, is not expected to cause significant time dilation effects on its own.
The challenges in observing and detecting dark matter arise from its weak interactions with ordinary matter. Dark matter interacts primarily through gravity, making it difficult to detect using conventional astronomical methods. Scientists are actively conducting experiments and observations to indirectly infer the presence of dark matter through its gravitational effects, such as the rotation curves of galaxies or the bending of light in gravitational lensing.
It's worth noting that the concept of "dark sector" and the properties of dark matter are still subjects of ongoing research and investigation. While speculations and alternative theories exist, it is essential to base conclusions on empirical evidence and rigorous scientific study.
In summary, time dilation near massive objects is not directly related to the challenges in detecting dark matter. The difficulty in observing dark matter primarily stems from its weak interactions with ordinary matter, and research efforts are focused on indirect detection methods based on gravitational effects.