Portuguese 
English 
Spanish 
3 min of reading 
0 comments 
Astronomers Discover a Super-Earth Just 20 Light-Years from Earth, With Water and Temperature Similar to Earth, One of the Most Promising Candidates for Life Beyond the Solar System.
A new and promising candidate in the search for life beyond Earth has just been identified by astronomers from Penn State University (USA) and confirmed by NASA and ESA observatories. The planet, temporarily nicknamed “Super-Earth HD 45652 b”, was detected in late 2024 at a distance of just 20 light-years from the Solar System, one of the shortest distances ever recorded for an exoplanet with potentially habitable characteristics.
The results, published in the Astrophysical Journal Letters and reported by NASA itself, indicate that this celestial body has about four times the mass of Earth and a predominantly rocky composition, with a dense atmosphere and signs of geological activity. But what caught scientists’ attention the most was its location: it orbits a stable red dwarf star, within the so-called “habitable zone”, the orbital range where the temperature allows for the existence of liquid water — an essential ingredient for life as we know it.
The New Frontier of Astrobiology
HD 45652 b is classified as a super-Earth, a term used to describe planets with a mass between 1 and 10 times that of Earth.
-
Scientists have discovered that the Earth recycles its own continents in the depths, dragging pieces of crust down during plate collisions and returning them later as magma, in a mechanism called relamination that has helped build the continents for billions of years.
-
New mathematical model indicates global population decline by 2064 in an extreme scenario of environmental crises, with humanity potentially halving if Earth’s sustainable capacity is reduced to 2 billion people.
-
Research led by the University of Zurich followed 12 crew members for ten months at the Concordia Station in Antarctica, where winter temperatures can drop to minus 80°C, and identified conflicts, distrust, perceived performance decline, and the formation of subgroups in an extreme environment.
-
Robot dives up to 500 meters into the dark depths of the sea to retrieve ghost nets that total more than 600,000 tons per year in the ocean and continue capturing animals for centuries.
The discovery was made possible through a combination of data from the James Webb Space Telescope (JWST) and the TESS (Transiting Exoplanet Survey Satellite) mission, which identified periodic variations in the brightness of the host star, indicating the planet’s passage in its orbit.
According to astronomer Dr. David Charbonneau from Harvard University and a collaborator on the study, “the stability of the orbit and the moderate radiation from the star make this planet one of the most promising targets for direct observation with Webb in the coming years.”
The orbital period is 38 days, and the estimated surface temperature can vary between –10 °C and 40 °C, conditions similar to those of temperate regions on Earth.
Possibility of Life and Atmospheric Composition
Using high-resolution spectroscopy, scientists detected signs of carbon dioxide and water vapor in the atmosphere, significantly increasing interest in studying the planet.
Although there is no confirmation of free oxygen, the main biological marker, the absorption pattern detected resembles that of planets with intense volcanic and oceanic activity.
“If the presence of oceans is confirmed, we may be facing the planet most similar to Earth ever found,” explained Lisa Kaltenegger, director of the Carl Sagan Institute (Cornell University).
The researcher argues that this world could become “the main target of the next generation of habitable telescopes,” such as HabEx and LUVOIR, missions planned by NASA for the 2030s.
Race for New Habitable Worlds
The discovery reinforces the exciting moment in planetary astronomy. Since 1995, when the first exoplanet was confirmed, more than 5,600 worlds beyond the Solar System have been cataloged, but only a fraction is within the habitable zone.
In the last five years, next-generation space telescopes have allowed the detection of smaller and closer planets, inaugurating a phase where the search for extraterrestrial life moves from the realm of fiction into the precision of data.
The planet HD 45652 b is now part of NASA’s restricted group of priority worlds for continuous observation. If future measurements confirm the presence of oxygen, methane, or chlorophyll, the finding could become one of the most important milestones in contemporary scientific history, redefining our understanding of our place in the cosmos.
-
1 person reacted to this.