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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.
14. 4. 2026
Étoiles | Exoplanètes | Télescope spatial James Webb | Atmosphères planétaire29 Cyg b is a massive companion to the star 29 Cygni, with a mass near the boundary between giant planets and brown dwarfs. Using the James Webb Space Telescope, astronomers directly imaged the planet and detected strong absorption from carbon monoxide and carbon dioxide in its atmosphere. The strength of the CO2 feature compared to CO indicates that 29 Cyg b is enriched in heavy elements, or metals, relative to its host star.
This enhanced metallicity suggests that 29 Cyg b likely formed wit...
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14. 4. 2026Étoiles | ExoplanèteA hidden companion may explain GJ 436 b's rare polar, eccentric orbit. New analysis sets strong limits on possible perturbers and shows how distant objects can shape planetary systems....
Read article >14. 4. 2026ÉtoileWD J000801.25-350450 is a hydrogen-rich white dwarf with two co-moving companions, including a possible binary. The system may be a rare quadruple, offering clues to stellar evolution....
Read article >14. 4. 2026Étoiles | ExoplanèteModeling shows GJ 486b's current water content depends on how much hydrogen-rich atmosphere it had early on. Even a small hydrogen envelope could have helped the planet keep its water....
Read article >14. 4. 2026ÉtoileALMA detected hydrogen sulfide and sulfur oxides in the inner disk of HD 163296. The findings show sulfur-bearing ices are sublimating near the star, shaping the chemistry of planet-forming regions....
Read article >14. 4. 2026Étoiles | Exoplanètes | Étoiles de type solaireTwo candidate planets have been detected around the Sun-like star HD 161098, including one in the habitable zone. Advanced techniques reveal tiny signals, marking progress in the search for Earth-like worlds....
Read article >14. 4. 2026Étoiles | Exoplanètes | Atmosphères planétaireTOI-4602 b is confirmed as a hot sub-Neptune orbiting a bright, quiet star. Its size and mass make it a prime target for JWST and Ariel to study how small planets lose their atmospheres....
Read article >Exoplanètes nouvellement découvertes
| HD 161098 c | 04 / 2026 | 7.8 M⊕ | 97 ly | |
| HD 161098 b | 04 / 2026 | 3.6 M⊕ | 97 ly | |
| TOI-7169 b | 03 / 2026 | 130.3 M⊕ | 1477.8 ly | |
| TOI 1232 b | 03 / 2026 | 220.6 M⊕ | 1068.4 ly | |
| TOI 1232 c | 03 / 2026 | 58.5 M⊕ | 1068.4 ly | |
| HIP 98599 b | 03 / 2026 | 2177.7 M⊕ | 248.2 ly | |
| HIP 39330 b | 03 / 2026 | 530.9 M⊕ | 118.7 ly | |
| HIP 21850 b | 03 / 2026 | 2622.7 M⊕ | 181 ly | |
| HIP 21850 c | 03 / 2026 | 1484.6 M⊕ | 181 ly | |
| HIP 10090 c | 03 / 2026 | 270.2 M⊕ | 268.4 ly | |
| HIP 10090 b | 03 / 2026 | 1230.3 M⊕ | 268.4 ly | |
| HIP 8923 b | 03 / 2026 | 3172.7 M⊕ | 214.8 ly | |
| HD 200133 b | 03 / 2026 | 14.4 M⊕ | 359.1 ly | |
| TYC 5709-354-1 c | 03 / 2026 | 3179.1 M⊕ | 436.9 ly | |
| LP 466-156 b | 03 / 2026 | - | 91.8 ly |
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