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A Century-Old Cosmic Mystery Solved rCo Four Hidden Planets Found Near Earth
By NASAApril 6, 2025No Comments 4 Mins Read

This artistrCOs concept pictures the planets orbiting BarnardrCOs Star, as seen from close to the surface of one of them. Credit: International
Gemini Observatory/NOIRLab/NSF/AURA/P. Marenfeld
Astronomers have confirmed the existence of four rocky planets orbiting BarnardrCOs Star, our nearest solitary stellar neighbor just six
light-years away.

Using ultra-sensitive instruments, scientists detected subtle wobbles in
the starrCOs light caused by the gravitational pull of these tiny worlds,
each far smaller than Earth. These signals were buried under a noisy background of stellar jitters, but through advanced modeling and precise
data analysis, researchers were able to separate the planet from the star.

A New Planetary Family Next Door
Astronomers have discovered four rocky planets, all significantly
smaller than Earth, orbiting
This artistrCOs concept pictures the planets orbiting BarnardrCOs Star, as seen from close to the surface of one of them. Credit: International
Gemini Observatory/NOIRLab/NSF/AURA/P. Marenfeld
Astronomers have confirmed the existence of four rocky planets orbiting BarnardrCOs Star, our nearest solitary stellar neighbor just six
light-years away.
This artistrCOs concept pictures the planets orbiting BarnardrCOs Star, as seen from close to the surface of one of them. Credit: International
Gemini Observatory/NOIRLab/NSF/AURA/P. Marenfeld
Astronomers have confirmed the existence of four rocky planets orbiting BarnardrCOs Star, our nearest solitary stellar neighbor just six
light-years away.

Using ultra-sensitive instruments, scientists detected subtle wobbles in
the starrCOs light caused by the gravitational pull of these tiny worlds,
each far smaller than Earth. These signals were buried under a noisy background of stellar jitters, but through advanced modeling and precise
data analysis, researchers were able to separate the planet from the star.

A New Planetary Family Next Door
Astronomers have discovered four rocky planets, all significantly
smaller than Earth, orbiting
The new paper confirming the four tiny worlds rCo labeled b, c, d, and e rCo relies on data from MAROON-X, an rCLextreme precisionrCY radial velocity instrument attached to the Gemini Telescope on the Maunakea mountaintop
in Hawaii. It confirms the detection of the rCLbrCY planet, made with
previous data from ESPRESSO, a radial velocity instrument attached to
the Very Large Telescope in Chile. And the new work reveals three new
sibling planets in the same system.

Too Hot to Host Life, but Full of Promise
These planets orbit their red dwarf star much too closely to be
habitable. The closest planetrCOs rCLyearrCY lasts a little more than two days; for the farthest planet, itrCOs is just shy of seven days. That
likely makes them too hot to support life. Yet their detection bodes
well in the search for life beyond Earth. Scientists say small, rocky
planets like ours are probably the best places to look for evidence of
life as we know it. But so far theyrCOve been the most difficult to detect
and characterize. High-precision radial velocity measurements, combined
with more sharply focused techniques for extracting data, could open new windows into habitable, potentially life-bearing worlds.

BarnardrCOs star was discovered in 1916 by Edward Emerson Barnard, a pioneering astrophotographer.

Behind the Discovery
An international team of scientists led by Ritvik Basant of the
University of Chicago published their paper on the discovery, rCLFour Sub-Earth Planets Orbiting BarnardrCOs Star from MAROON-X and ESPRESSO,rCY
in the science journal, The Astrophysical Journal Letters, in March
2025. The planets were entered into the NASA Exoplanet Archive on March
13, 2025.

Explore Further: After 100 Years of Searching, Astronomers Confirm Four Planets at BarnardrCOs Star

Reference: rCLFour Sub-Earth Planets Orbiting BarnardrCOs Star from MAROON-X and ESPRESSOrCY by Ritvik Basant, Rafael Luque, Jacob L. Bean, Andreas Seifahrt, Madison Brady, Lily L. Zhao, Nina Brown, Tanya Das, Julian
St|+rmer, David Kasper, Rohan Gupta and Gu-amundur Stef|insson, 11 March
2025, The Astrophysical Journal Letters.
DOI: 10.3847/2041-8213/adb8d5


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