It’s confusing. The wikipedia article at the top says these dark stars would not be visible to us, then below says that some candidates for dark stars at some point had luminosity of billions of Suns.

https://en.wikipedia.org/wiki/Dark_star_(dark_matter)

The article from sci.news discusses the possibility of NASA’s James Webb Space Telescope (Webb) observing light emitted by supermassive dark stars both in the early and current universe. These stars, which could be 100 times larger and million times brighter than the sun, are hypothetical and yet to be observed. They are believed to emit a significant amount of light in the infrared spectrum, making them prime targets for Webb.

Dark stars, as per the article, may have played a crucial role in the formation of supermassive black holes. Their gigantic size would allow them to collapse directly into black holes, bypassing the supernova stage. This theory could resolve the mystery of how certain black holes formed just 690 million years after the Big Bang.

The article further explains that dark stars are fueled by dark matter annihilation rather than nuclear fusion. Their interaction with dark matter particles gives them a unique light signature which Webb’s sensors might be able to detect. This creates a new approach to detect and verify the presence of dark matter, which is yet to be directly observed.

In conclusion, the soon-to-be-launched Webb could possibly confirm the existence of these formidable stars, understanding their contribution to early black hole creation, and also provides a new approach in our pursuit of observing dark matter directly.