No, dark matter cannot be directly seen through a telescope. Dark matter does not interact with light or electromagnetic radiation in the same way that normal matter does, which is why it is called "dark." It does not emit, absorb, or reflect light, making it invisible to telescopes that rely on detecting light.
The presence of dark matter is inferred through its gravitational effects on visible matter and light. Astronomers observe the gravitational interactions of visible matter, such as stars and galaxies, and deduce the presence of dark matter based on the gravitational forces required to explain their observed motions.
There have been efforts to indirectly detect dark matter using various methods. For example, experiments have been conducted to search for weakly interacting massive particles (WIMPs), which are one of the proposed candidates for dark matter. These experiments aim to detect the rare interactions between WIMPs and normal matter, such as through scattering or annihilation processes. However, to date, no definitive direct detection of dark matter has been achieved.
In summary, dark matter remains elusive and invisible to telescopes or direct detection methods. Its presence is inferred through its gravitational effects on visible matter in the universe.