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Stellar Brief: 20. 10. 2026
The planet-forming disk around HD 100546 contains an unexpectedly high amount of methyl formate: ALMA measured a methyl-formate-to-methanol ratio of about 2, hinting that active chemistry is reshaping the ingredients from which planets form.
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Latest astronomy Новости
6. 5. 2026
Звезды | Экзопланеты | Космический телескоп имени Джеймса Уэбба | Атмосферы планетCOCONUTS-2b is one of the coldest known planetary-mass companions, orbiting far from its M dwarf host star. Using the JWST MIRI/MRS instrument, scientists obtained a detailed spectrum of its atmosphere at a temperature of about 480 K. For the first time, they detected rare isotopologues—molecules with different isotopes—of ammonia and water: ^{15}NH3, H2^{18}O, and H2^{17}O. This is the first clear evidence of oxygen isotopes in water in a cold planetary companion.
The study combined JWST and...
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6. 5. 2026Звезды | Экзопланеты | Космический телескоп имени Джеймса УэббаLHS 3844 b is a rocky exoplanet whose surface was studied using mid-infrared spectroscopy from the James Webb Space Telescope. The planet's thermal emission spectrum between 5 and 12 microns matches that of a dark, low-silica surface, such as basalt or olivine-rich rock. The data rule out the presence of fresh powdery surfaces, but space weathering could darken such materials to match the observations.
The spectrum shows no evidence for signif...
Read article 6. 5. 2026Звезды | Экзопланеты | Атмосферы планет | Горячий юпитерMASCARA-5 b (also known as TOI-1431 b) is an ultra-hot Jupiter orbiting a bright Am star. Using the EXPRES spectrograph, scientists confirmed the presence of neutral iron (Fe I) in the planet's dayside atmosphere with high significance. The detection supports previous findings and indicates that the planet's atmosphere is thermally inverted, with temperatures rising from about 2000 K at lower altitudes to around 4500 K higher up.
No evidence w...
Read article 6. 5. 2026Звезды | ЭкзопланетыDelorme 1 (AB)b is a young, massive planet—about 13 times the mass of Jupiter—orbiting a binary star at a wide distance. Using high-resolution optical spectroscopy, scientists detected seven helium emission lines from the planet, which show significant variability and asymmetric profiles. The lines have both narrow and broad components, with the broad part redshifted by about 15 km/s, indicating complex gas motions.
The analysis suggests that ...
Read article 6. 5. 2026Звезды | ЭкзопланетыThe β Pictoris young moving group contains a variety of substellar objects, including gas giants and brown dwarfs. Scientists studied the atmospheric chemistry and isotope ratios of three members: the planetary-mass companion 2MASS J0249-0557 c and two benchmark brown dwarfs. Using high-resolution spectroscopy, they measured the carbon-to-oxygen ratio, metallicity, and the ratio of carbon isotopes in their atmospheres.
2MASS J0249-0557 c, with...
Read article 6. 5. 2026Звезды | ЭкзопланетыGJ 436 b is a warm Neptune-sized planet orbiting a red dwarf star. Scientists used the ESPRESSO spectrograph to observe two transits of the planet, aiming to detect atomic and molecular species in its upper atmosphere. The observations covered a wide range of optical wavelengths and searched for signals from hydrogen, sodium, magnesium, iron, and other elements, as well as molecules like titanium oxide and vanadium oxide.
The analysis found no...
Read article 6. 5. 2026Звезды | ЭкзопланетыWASP-121 b is an ultra-hot Jupiter with extreme atmospheric conditions, including high temperatures, strong winds, and dramatic differences between its day and night sides. Using the James Webb Space Telescope, scientists measured how the planet's infrared emission changes as it orbits its star, creating a spectroscopic phase curve. Comparing these observations to advanced 3-D atmospheric models, they found that the models predict about 12% more ...
Read article 6. 5. 2026Звезды | ЭкзопланетыTOI-1130b is a mini-Neptune planet in a rare system with an outer hot Jupiter, both orbiting in a 2:1 resonance. Using the James Webb Space Telescope, scientists measured the planet's transmission spectrum and detected water vapor, carbon dioxide, and sulfur dioxide in its atmosphere, with a possible hint of methane. The atmosphere has a high mean molecular weight and is rich in heavy elements, suggesting it contains many volatiles.
The result...
Read article 6. 5. 2026Understanding the interior structure of rocky and water-rich exoplanets requires accurate equations of state (EoS) that describe how materials behave under different pressures and temperatures. The new PALEOS toolkit brings together EoS for iron, magnesium silicate, and water into a unified, phase-aware framework that covers 17 different material phases. This allows scientists to model density, energy, entropy, heat capacity, and other properties...
Read article 6. 5. 2026Звезды | ЭкзопланетыGJ 1132 b is an Earth-sized planet orbiting a small red dwarf star every 1.6 days. Scientists studied how much high-energy XUV radiation the planet has received over its lifetime, which is important for understanding whether it can keep an atmosphere. By analyzing the star's activity and flare history, they found that GJ 1132 b has likely received at least 50 times more XUV radiation than Earth does today.
The study compared different models f...
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Недавно обнаруженные экзопланеты
| 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 |
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