There may be fewer habitable planets circling nearby stars than has been thought.
A new 3-D computer model has changed scientists' expectations about how many alien planets could sustain life.
An alien planet climate analysis cuts nearly in half the estimated number of habitable planets in our galaxy, scientists reported on Wednesday. The findings arise from a new 3-D computer model that reveals the climates of other worlds may be warmer than researchers expected.
Over the past two decades, the discovery of hundreds of planets orbiting nearby stars has bolstered speculation that some might be home to life as we know it. Since there is life virtually wherever there is liquid water on Earth, the search for extraterrestrial life is especially focused on worlds in the so-called "habitable zones" of stars, where temperatures are just right—not too hot and not too cold—for seas of liquid water to exist.