etoile
exoplanètes
Nouvelles
Stellar Brief: 22. 10. 2026
A young, planet-hosting star called V1298 Tauri is showing how fiercely active infant planetary systems can be: radio emissions appeared in 90 percent of monitoring visits, while its X-ray brightness also changed and showed a stellar flare.
Read today's Stellar Brief
Latest astronomy nouvelles
27. 2. 2026
Étoiles | Objets stellaires jeuneThis research investigates how young stars grow by pulling in material from their surrounding environment, specifically within the DF Tauri binary system. By using high-resolution observations, astronomers analyzed the primary star in this pair to see if its companion affects how it 'feeds' on gas and dust.
They found that despite being part of a double-star system, the primary star follows a traditional growth model where a strong magnetic field acts like a funnel, guiding material from a n...
Read article 
Advertisement
27. 2. 2026Étoiles | Exoplanètes | TESS | Naines rouges | Super-TerreA comprehensive search of over 8,000 small, cool stars known as mid-to-late M dwarfs has revealed that these stars are the most common hosts for small planets in our galaxy. Unlike larger stars like our Sun, which typically show a clear 'radius valley'—a gap where planets of a specific size are rarely found—these small stars host a continuous range of planet sizes peaking at about 1.25 times the size of Earth.
The study found that rocky 'supe...
Read article 26. 2. 2026ÉtoileThis study examines the atmospheric behavior and chemical composition of five well-known Mira-type variable stars: RY Cep, SU Cam, T Cep, V667 Cas, and OR Cep.
These aging stars undergo dramatic pulsations that create powerful shockwaves in their atmospheres, leading to the appearance of specific emission lines in their light spectra. By analyzing these spectroscopic changes, the research explains how the balance between carbon and oxygen det...
Read article 26. 2. 2026Étoiles | Objets stellaires jeunes | GaiUsing the Very Long Baseline Array, researchers have conducted a detailed survey of young stellar objects within the Orion complex to map its three-dimensional structure with unprecedented precision. By detecting 216 compact radio sources and tracking the movement of 58 of them over multiple epochs, the study successfully measured their distances and motions.
The findings reveal that the Orion complex spans distances from 380 to 440 parsecs, p...
Read article 25. 2. 2026Étoiles | Exoplanètes | PLATO | TESSAstronomers have successfully characterized three new 'warm Jupiters'—gas giant planets similar in size to Jupiter but with much longer orbits than the typical 'hot Jupiters' found close to their stars.
Using data from the TESS space telescope and the new PLATOSpec instrument, the team identified TIC 147027702 b, which orbits its star every 44 days; TIC 245076932 b, a planet with a notably oval-shaped, eccentric orbit and a 21-day period; and...
Read article 24. 2. 2026Étoiles | Exoplanètes | Formation des planèteAstronomers have conducted a detailed study of AT Pyx, a young star surrounded by a planet-forming disk located inside a unique environment called a cometary globule. Using advanced instruments like the VLT and ALMA, researchers discovered that the disk is not perfectly circular but eccentric, featuring distinct spiral arms that may be shaped by a hidden planet with a mass anywhere from a fraction of Jupiter up to three times its size.
The stu...
Read article 24. 2. 2026Étoiles | Objets stellaires jeunes | ExoplanèteA detailed survey of the young star MWC 480 has revealed a massive disk of dust and gas where new planets are likely forming. By combining data from the ALMA and VLA telescopes, researchers identified a prominent dust ring located 95 astronomical units from the star—more than double the distance of Pluto from our Sun. This specific ring contains enough solid material to build the cores of several giant planets.
The study also discovered a new...
Read article 24. 2. 2026Étoiles | Exoplanètes | | Atmosphères planétaireAstronomers have successfully analyzed the atmosphere of HAT-P-44 b, a gas giant similar in size and temperature to Saturn, located in a tight orbit around its star. Using the William Herschel Telescope, the team detected the chemical signature of sodium and found evidence of water vapor within the planet's envelope.
The findings suggest the planet has a relatively clear atmosphere at high altitudes, free from thick clouds, and a chemical com...
Read article 24. 2. 2026Étoiles | Exoplanètes | Naines rougeA new study reveals that the surface terrain of rocky planets orbiting M-dwarf stars plays a crucial role in their climate and habitability. These planets are often tidally locked, meaning one side always faces the star while the other remains in darkness.
Researchers found that steep mountains and high plateaus create stationary atmospheric waves that disrupt air circulation. This process strengthens winds that carry moisture to the cold nig...
Read article 23. 2. 2026Étoiles | Exoplanètes | Atmosphères planétaires | Naines rougeAstronomers have conducted the most detailed study to date of GJ 436 b, a famous 'warm Neptune' exoplanet located 33 light-years away. Despite its similarities to our own Neptune, this world orbits its red dwarf star so closely that its year lasts only 2.6 days.
New high-resolution observations found no traces of expected gases like water vapor or methane, leading scientists to conclude that the planet is either shrouded in extremely high-alt...
Read article Top article categories
Filtered articles by category.
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 | |
| L 115-21 b | 10 / 2026 | 0.4 M⊕ | 41.9 ly | |
| TIC 219893931 b | 09 / 2026 | 8.9 M⊕ | 1319.5 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 |
Newly discovered exoplanets
Latest scientific studies
Parcourez les dernières études scientifiques sur les étoiles et les exoplanètes de notre galaxie. Découvrez les dernières recherches en astrophysique et en astronomie stellaire.
Publications plus anciennes