In a First, 'Super-Earth' Planet Shows It Could Have an Atmosphere
"Scientists say they have detected promising signs that a planet orbiting a star 49 light-years from Earth could have an atmosphere," reports CNN, "making it potentially suitable for life." Called LHS 1140b, the object is about five times the mass of our planet, or a "super-Earth." This planet orbits around its star in the "Goldilocks zone," also known as the habitable zone, meaning its surface…
New evidence suggests that a planet named LHS 1140b may possess an atmosphere, potentially making it habitable for life. Located approximately 49 light-years away from Earth, this "super-Earth" is roughly five times the size of our own planet. This celestial body resides within the Goldilocks zone, also referred to as the habitable zone, where temperatures are not excessively hot nor cold, allowing for the possibility of liquid water on its surface.
Collin Cherubim, a planetary scientist and the lead author of a paper on the discovery, stated that the findings indicate LHS 1140b could have an iron core, a silicate mantle, and a low-density component, which is likely a mixture of water and an atmosphere. Should further observations validate these findings, LHS 1140b would become the first rocky planet in the habitable zone of another star to have an atmosphere, marking a significant milestone in astronomy.
At present, there is no evidence of life or a life-supporting atmosphere on LHS 1140b. However, Cherubim believes the planet to be a promising candidate for potential extraterrestrial life signatures. "It's mostly rocky, situated at the right temperature to support liquid water on the surface, and it has an atmosphere — those are the three key ingredients we look for," he explained.
The discovery of an atmosphere on a rocky planet orbiting a red dwarf is particularly noteworthy in the field of astronomy, as the possibility of such a phenomenon has been a subject of ongoing debate. Cherubim emphasized that this detection serves as a source of relief for many researchers. He added, "It's kind of a sigh of relief for a lot of us. But the jury's still out. Maybe this is a weird planet, and it's an oddball, or maybe it's the first of many. We don't know yet."
The James Webb Space Telescope and the Hubble Space Telescope will closely monitor LHS 1140b in the coming months, with the ultimate goal of confirming the existence of a substantial atmosphere. While no definitive proof currently exists to support a robust atmosphere on the planet, identifying helium would be a significant breakthrough.
This would not only validate the presence of an atmosphere but also suggest that some habitable zone Super-Earths around red dwarfs can withstand the intense early activity of their host stars, thereby shedding light on the possibility of life existing beyond our solar system.
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