A study led by Dirk Schulze-Makuch, a geobiologist at Washington State University (WSU), was published last month in the journal Astrobiology,media CNET reported. The paper identifies more than two dozen exoplanets that may be “super livable” worlds that are more habitable than our planet earth.
The researchers created a set of criteria for planets to meet potential super-liveability. The list includes between 5 billion and 8 billion years old (about 4.5 billion years on Earth) and the location of liquid water that may exist in the livable zone of the star. They also looked for long-lived stars with lower temperatures than our sun.
Instead of focusing on Earth’s “clones,” the team is looking for planets larger than our own. “A planet with a mass about 1.5 times the mass of Earth will hopefully retain its internal heating for a long time through radioactive decay and will also have a stronger gravitational force to retain the atmosphere for a longer period of time,” the team said in a statement Monday.
The team applied the criteria to 4,500 known exoplanets and identified 24 planets closest to meeting the requirements.
However these candidate planets are more than 100 light-years away, which means they are too far away.
“We have to look at some of the planets with the most promising conditions for complex life,” Schulze-Makuch said. “However, we must be careful not to get caught up in the search for a second Earth, because there may be planets that may be more suitable for life than ours.”
( As reported by SmallTechNews and India Today)