In a recent research a group of planets have been detected outside our solar system where life may exist, because they have the same chemical conditions that may have caused life on earth develop.
According to the study published in the journal Science Advances, ultraviolet (UV) light that is generally released by the stars plays a key role to develop life on the planets. These planets generally revolve around the stars. If those stars release ultraviolet light, life may develop on the planets that are revolving around them because the UV light helps chemical reactions occur to make the building blocks of life.
Scientists have detected a group of planets like earth where the amount of UV light is abundant to support chemical reactions that cause life to exist. They got ultraviolet light from their host star. According to them, the existence of liquid water could be possible there.
Source: https://timesofindia.indiatimes.com/home/science/exoplanets-where-life-could-develop-like-earth-identified/articleshow/65238866.cms