A new study by scientists in the United States and Germany suggests that 24 planets outside the solar system may be more livable than Earth, according to a recent report on the American Fun Science website. These planets are “older”, warmer and weeer than Earth, and a little larger, and some of them may be perfect places to find extraterrestronity life. The study was led by Professor Deke Schulzer-Markucci of Washington State University, who worked with astronomers at the Max Planck Institute for Solar Systems and Villanova University to make the latest discovery.
Most of the exoplanets that astronomers have discovered so far are not conducive to life, but there are many in the stellar livable zone that may be suitable for life. The livable zone refers to the just right distance between planets and stars, so that their surface temperatures are not hot or cold for life as we know them. The makuci team’s goal is to identify the most promising “super livable” exoplanets, which are not only located in the livable zone of stars, but also have other features that may be more livable than Earth.
After analysis, the researchers mapped the perfect “super-liveable planet”: it would orbit a K dwarf star slightly cooler than the sun (yellow dwarf), about 5 billion to 8 billion years old, 10 percent bigger than Earth, and at an average temperature higher than Earth. With a high temperature of 5 degrees C and an atmospheric oxygen content of between 25% and 30%, the land is dispersed and abundant in water, and there are plate tectonics or similar geological processes to recover minerals and nutrients and create diverse habitats and terrain. In addition, the planetary satellite is 1 to 10 percent of its size and orbits it at an appropriate distance.
Based on this criteria, they identified 24 objects, two of which are Kepler 1126b and Kepler 69c, 9 orbiting the appropriate type of star, 16 of the right age, 5 of which are of the right temperature, and only KOI 5715.01 meets all of these conditions, but the surface temperature depends on the intensity of the greenhouse effect in its atmosphere.
Given that all 24 planets are more than 100 light-years from Earth, some are now unable to be studied with the help of the most powerful telescopes to date, but it is important to find out why a planet is a “super-liveable planet” because scientists are likely to find one in 100 light-years, the researchers said. If so, the planet should be our first choice to find out if there is any other life in the universe.
The researchers believe that livable planets cannot be found based on the Earth’s livable conditions alone. “We have to focus on finding the planets that are most likely to thrive on complex life, because there may be planets that are better suited to life than Earth, ” says Mr Markucci. “