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Latest astronomy nouvelles
Restez informé(e) des dernières actualités astronomiques, des découvertes sur les étoiles et les exoplanètes, et des recherches en cours. Découvrez de nouveaux articles sur l'astronomie.
1. 8. 2026
Étoiles | ExoplanèteResearchers have identified potential radio signals coming from the HD 189733 system, a discovery that may offer insights into the magnetic fields of planets outside our solar system. Detecting such auroral radio emissions—light produced when charged particles interact with magnetic fields—is a key method for understanding the interiors and potential habitability of distant worlds. The signal was recorded at low frequencies.
The team analyzed data using a technique called beamforming, which c...
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1. 8. 2026Étoiles | Exoplanètes | Objets stellaires jeunes | Formation des planèteThe star CQ Tauri shows indirect signs of a companion affecting its surrounding environment. Observations reveal a large cavity in the disk of material around the star, measuring approximately 25 astronomical units across, with a prominent ring of dust peaking at a distance of 53 astronomical units. An astronomical unit is the average distance from the Earth to the Sun.
To understand this structure, researchers simulated how gas and dust behav...
Read article 1. 8. 2026Étoiles | ExoplanèteThe bright F-type star HD 148797 hosts two moderate-period planets, classified as sub-Jovian worlds with unusually low density. These planets reside in a region of space known as the Neptunian savanna, a classification for planets with specific ranges of size and orbital distance. The findings provide insights into how such systems form and evolve, suggesting they often develop in dynamically stable environments rather than through violent orbita...
Read article 1. 8. 2026Étoiles | Exoplanètes | TESS | Naines rouges | Formation des planètes | Naines blancheThe giant planet TOI-5628Ab orbits a mid-type Red dwarf star every 4.34 days. This planet is part of a complex system that also includes a distant white dwarf companion, a remnant of a star that has exhausted its nuclear fuel. By studying this system and comparing it to a wider population of similar stars, the research identifies a strong connection between the presence of distant stellar companions and the existence of large planets orbiting ver...
Read article 1. 8. 2026Étoiles | ExoplanèteThe π Mensae star system, which hosts the first exoplanet detected by the Transiting Exoplanet Survey Satellite (TESS), has been the subject of a comprehensive new study. By combining six years of TESS photometry — the measurement of a star's brightness over time to detect dips caused by orbiting planets — with 22 years of radial velocity data, which tracks the tiny wobbles in a star’s motion caused by a planet’s gravitational pull, this research...
Read article 1. 8. 2026Étoiles | Exoplanètes | Formation des planèteThe protoplanetary disk surrounding the star HD 169142 contains complex dust structures that provide clues about how planets form. A new analytical framework has been developed to process data from the Atacama Large Millimeter/submillimeter Array (ALMA), an interferometer that combines radio telescopes to capture high-resolution images. This method improves upon traditional techniques by reducing biases caused by limited image resolution, allowin...
Read article 1. 8. 2026Étoiles | Exoplanètes | TESSResearchers have completed a detailed re-analysis of two planetary systems, TOI-4438 and TOI-442, providing more precise physical data for their orbiting planets. By combining new transit observations from the TESS space telescope with high-resolution infrared spectroscopy, the study clarifies the properties of these worlds. The analysis also investigated the magnetic activity of the host stars, which are both Red dwarf stars, to improve the accu...
Read article 1. 8. 2026Étoiles | Exoplanètes | Atmosphères planétaires | Exoplanètes habitableSpectroscopic observations have identified escaping helium from the atmosphere of LHS 1140b, a rocky exoplanet located within the habitable zone of its host star. While scientists have previously observed atmospheric loss on massive gas giants, such evidence for rocky, Earth-like worlds is rare. This finding provides significant insight into the evolution and composition of planetary atmospheres in systems orbiting low-mass stars.
The findings...
Read article 1. 8. 2026Étoiles | ExoplanèteTIC 241249530 b is a rare, highly eccentric planet often described as a hot Jupiter progenitor. Orbiting a star at a distance that varies significantly, this planet is currently in the process of migrating toward its host star. This transition is driven by high-eccentricity migration, a process where a planet’s orbit is stretched into a very elongated shape, eventually shrinking and circularizing due to intense tidal forces.
The research exami...
Read article 1. 8. 2026Étoiles | Exoplanètes | Formation des planètePlanet formation begins within protoplanetary disks, which are swirling clouds of gas and dust surrounding young stars. To understand how planets emerge, it is critical to determine the size of dust grains within these disks. A new method has been developed to estimate these sizes by measuring how quickly different regions of a disk cool down. This technique specifically analyzes transitional disks where an inner disk is tilted, casting a distinc...
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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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Parcourez les dernières études scientifiques sur les étoiles et les exoplanètes de notre galaxie. Découvrez les dernières recherches en astrophysique et en astronomie stellaire.
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