In a star system, it is unlikely for life as we know it to exist without any visible stars. Stars are crucial for providing the necessary energy and heat required for life to thrive on planets within a system. However, it's important to note that there may be alternative forms of life or exotic environments where life could potentially exist in unexpected ways.
On Earth, for example, sunlight is a fundamental source of energy that sustains life through photosynthesis. Without stars, there would be no such energy source to support the complex ecosystems we observe.
That being said, there are hypothetical scenarios where life might exist without visible stars. One such scenario is the existence of rogue planets, which are not gravitationally bound to any star and drift through space. These rogue planets could potentially have an internal heat source, such as residual heat from their formation, radioactive decay, or tidal forces generated by interactions with other celestial bodies. However, the likelihood of such environments supporting complex life forms as we know them remains uncertain and speculative.
In summary, while it is theoretically possible for life to exist in unconventional scenarios, the absence of visible stars in a star system greatly diminishes the chances of supporting life as we currently understand it.