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Stellar Brief: 20. 10. 2026
Today’s standout finding changes the story of PDS 70: the young star is estimated to be 12 to 16 million years old, about three times older than previously thought. Alpha Centauri was the leading Stellarcatalog search query, with 1,537 impressions on October 19.
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Latest astronomy nouvelles
30. 1. 2026
Étoiles | Exoplanètes | Jupiter chaudAstronomers have conducted a detailed study of the scorching dayside of WASP-33 b, a giant gas planet much hotter than any planet in our solar system. By analyzing light captured during eclipses, the team discovered a thermal inversion layer where the atmosphere actually gets hotter with altitude, similar to how Earth's stratosphere behaves.
The findings reveal a complex chemical cocktail including water vapor, carbon monoxide, and likely titanium oxide, all wrapped in a high-metallicity env...
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30. 1. 2026Exoplanètes | TESS | Naines rouges | Super-TerreAstronomers using the high-precision ESPRESSO spectrograph have detailed two fascinating planetary systems orbiting small, cool red dwarf stars. Around the star TOI-4336 A, they found a rocky super-Earth and a gaseous sub-Neptune, the latter of which is a prime candidate for future atmospheric study.
Meanwhile, the star TOI-4342 hosts two sub-Neptunes of nearly identical size but different densities, along with a newly detected third planet—a...
Read article 30. 1. 2026Astronomers have discovered a new planet in the HD 176986 planetary system, located about 91 light-years away from our Sun. Using high-precision instruments to filter out stellar activity, researchers identified a third world joining the two previously known super-Earths.
This new planet, HD 176986 d, orbits its star every 61 days and is nearly seven times more massive than Earth. All three planets in this system are classified as super-Earth...
Read article 29. 1. 2026ÉtoileAstronomers using the Keck Planet Finder have detected the most extreme atmospheric winds ever recorded on a gas giant outside our solar system. By observing the ultra-hot Jupiter KELT-9 b as it orbits its star, researchers measured supersonic winds reaching speeds of nearly 12 kilometers per second—over 40,000 kilometers per hour.
These massive winds carry heat from the permanent dayside to the nightside, revealing a complex global climate. ...
Read article 28. 1. 2026ÉtoileA new study focusing on the Earth-like exoplanet TRAPPIST-1e suggests that the transition to an oxygen-rich atmosphere, known as the Great Oxidation Event, could occur up to a billion years sooner than it did on our own planet.
While Earth's atmosphere took hundreds of millions of years to accumulate oxygen after the appearance of life, the unique light from M-dwarf stars promotes more efficient ozone formation. This process lowers the barrie...
Read article 28. 1. 2026Étoiles | Exoplanètes | Naines blancheUsing the James Webb Space Telescope, astronomers have discovered a significant infrared glow around white dwarf star WD 0644+025, an unusually heavy white dwarf located within 25 parsecs of Earth. This excess heat suggests the presence of a giant planet, roughly seven times the mass of Jupiter, orbiting the remains of this dead star.
While white dwarfs are the final stage of stars like our Sun, this particular star is unique because it shows...
Read article 28. 1. 2026Astronomers have discovered a fascinating planet candidate, named HD 137010 b, which bears a striking resemblance to Earth. Located around a bright star similar to our Sun, this world is almost exactly the same size as Earth and orbits its star every 355 days—a year nearly identical to our own. Because it sits at the outer edge of the 'habitable zone,' it receives just enough light and heat that it could potentially host liquid water.
This di...
Read article 27. 1. 2026ÉtoileAstronomers have discovered a new giant planet named TOI-6692b, which is similar to Jupiter but follows a much more elongated, eccentric path around its star. While Earth takes a year to orbit the Sun in a nearly circular path, this massive world completes its orbit in 130 days, swinging in and out due to its oval-shaped trajectory.
Initially spotted by a single shadow it cast while passing in front of its star, its existence was confirmed usi...
Read article 6. 1. 2026Étoiles | Étoiles à neutroModels favor a neutron star instead of a colder white dwarf. LAMOST J2354+3356 is over 400 light years away, and is the closest neutron star candidate....
Read article 4. 1. 2026Étoiles | Exoplanètes | Étoiles de type solaire | Télescope spatial James WebbResearchers have compiled detailed spectral energy distributions for 20 stars that hosted exoplanets studied by the James Webb Space Telescope. By measuring the X-ray and ultraviolet light emitted by these stars, the team highlights how intense radiation impacts the atmospheres of orbiting planets. This data includes vital information on stars like Tau Ceti, helping experts better understand the potential for atmospheric loss on these worlds....
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Exoplanètes nouvellement découvertes
| EK Chamaeleontis b | 10 / 2026 | 2702.2 M⊕ | 321.3 ly | |
| HD 715 b | 10 / 2026 | 201.9 M⊕ | 542.8 ly | |
| DENIS J1253-5709 b | 10 / 2026 | 244.8 M⊕ | 54.4 ly | |
| TOI-6417 b | 09 / 2026 | 349.7 M⊕ | 1903.9 ly | |
| TOI-6443 b | 09 / 2026 | 1605.4 M⊕ | 2051.6 ly | |
| TOI-7219 b | 09 / 2026 | 661 M⊕ | 1074.2 ly | |
| TOI-4079 B b | 09 / 2026 | 1646.8 M⊕ | 1185.6 ly | |
| HD 45652 b | 09 / 2026 | 1557.7 M⊕ | 113.9 ly | |
| LSPM J0804+1116 b | 09 / 2026 | 6.4 M⊕ | 82.6 ly | |
| HR 8799 f | 09 / 2026 | 524.5 M⊕ | 133.3 ly | |
| 61 Cygni A b | 09 / 2026 | 2543.3 M⊕ | 11.4 ly | |
| TOI-5646 b | 08 / 2026 | 45.9 M⊕ | 1352.3 ly | |
| TOI-4468 c | 08 / 2026 | 11.1 M⊕ | 1233.1 ly | |
| TOI-4468 b | 08 / 2026 | 170.1 M⊕ | 1233.1 ly | |
| TOI-4468 d | 08 / 2026 | 311 M⊕ | 1233.1 ly |
Newly discovered exoplanets
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