A fascinating new exoplanet, which has the potential to support life, has been found and is being dubbed Earth’s “next-door neighbor.” This discovery may represent a significant advancement in the quest to locate extraterrestrial life.
Paul Robertson from the University of California, Irvine, expressed enthusiasm in a statement on Tuesday, noting, “This one’s exciting,” and highlighting its close proximity by saying, “it’s one of our closest cosmic neighbors.”
Robertson, who leads the study published in The Astrophysical Journal, elaborated, “Though twenty-five light years may seem distant, considering the Milky Way spans about 100,000 light years, this makes it practically next door.”
The exoplanet, named “GJ 3378b,” is about twice the size of Earth. It exists within the “Goldilocks zone,” a region around a star that provides conditions necessary for maintaining liquid water on the planet’s surface.
A key factor in determining if GJ 3378b can host life is whether it has an atmosphere. Positioned on what’s known as the “cosmic shoreline,” this exoplanet’s capability to retain an atmosphere depends on its gravity in relation to the radiation it encounters.
“If you scale the Earth down to the size of an apple, its atmosphere would be about as thick as the skin of the apple,” said Robertson.
“That’s just enough to maintain the kinds of surface pressures where you can have liquid water,” he explained.
“It’s enough that there’ll be breathable air, and it provides maybe a little bit of protection from the harsh radiation environment of space.”
More observatories are required to determine if a given planet has any kind of atmosphere, which could “justify further research looking for biosignatures, liquid water or other signs of life that require both an atmosphere and the right amount of heating from the host star,” said Gogod James, a UC Irvine student in Robertson’s group who helped study the size of GJ 3378b.
NASA has plans to construct the Habitable Worlds Observatory, which is slated to launch in the next 20 years or so.
If completed, astronomers will begin to search for chemicals in atmospheres that could have been produced by life.
“I think that’s just too much fun,” said Robertson.