Astronomers identify 45 planets with strongest chances yet of supporting alien life
Astronomers have identified 45 planets that may offer the strongest chance yet of supporting alien life.
After analyzing more than 6,000 known worlds beyond our solar system, a study was published by Cornell University on so-called exoplanets orbiting stars other than the Sun that have conditions that could allow water and potentially life.
The research focused on rocky planets that lie within a habitable range of their stars, often referred to as the “Goldilocks zone,” where temperatures are neither too hot nor too cold for liquid water to exist.
Some of the selected planets are believed to exhibit weather systems, including cloud cover, humidity and wind patterns.
Among the 45 identified candidates is Proxima Centauri b, an Earth-sized planet orbiting the star closest to the Sun, about 4.2 light-years away.
Study co-author Abigail Bohl said: “We know Earth is habitable, but Venus and Mars are not. We can use our solar system as a reference to look for exoplanets that receive stellar energy between that of Venus and Mars.”
Planets are located in systems such as TRAPPIST, where conditions may allow stable climates and atmospheres.
For life to exist as currently understood, planets need not only liquid water but also a proper chemical balance and long-term environmental stability, scientists say.
One of the most closely studied candidates, Proxima Centauri b, is located more than 24 trillion miles from Earth.
At this distance, even Voyager 1, the fastest spacecraft to leave the solar system, would take approximately 75,000 years to reach this distance, revealing the limits of current space travel.
Instead, astronomers rely on advanced telescopes to study these distant worlds, using indirect observations to determine atmospheric composition, temperature ranges and potential habitability.
Comparison with planets in our own solar system, including Venus and Mars, allows researchers to establish criteria for determining which exoplanets might support life.
The findings build on ongoing efforts in astronomy to improve the search for habitable planets by focusing on those that share key features with Earth while avoiding the extreme conditions observed on neighboring planets.
