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Stellar Brief: 19. 10. 2026
The cold brown dwarf WISE 0855 has weather that looks strikingly planet-like: James Webb observations reveal patchy water clouds and changing atmospheric gases, including carbon monoxide and phosphine.
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Latest astronomy Новости
6. 6. 2026
Звезды | ЭкзопланетыStars born from the same cloud in a binary system are generally expected to have identical chemical compositions. However, some binary systems exhibit unexplained chemical differences, leading researchers to debate whether these anomalies originate from their birth environment or are the result of external events. This study examines the binary pair HD 129171 and HD 129209, which show significant differences in their abundances of iron, lithium, and other elements.
To investigate these differ...
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4. 6. 2026Звезды | ЭкзопланетыThe binary star system HD 81809 presents a significant chemical mystery, as its two components exhibit a striking difference in metallicity — the abundance of elements heavier than hydrogen and helium. While the primary star has a low metallicity, the secondary star, HD 81809B, shows a metallicity closer to that of our Sun. Scientists are investigating whether this anomaly could be the result of the secondary star having engulfed one or more plan...
Read article 4. 6. 2026Звезды | ЭкзопланетыHD 209458b is perhaps the most famous hot Jupiter, having been the first planet where researchers successfully measured atmospheric composition and discovered hints of aerosol-related effects. These massive, hot gas giants provide essential insights into planetary atmospheres, but confirming the specific composition of their clouds has remained a challenge. New observations from the James Webb Space Telescope (JWST) have now directly measured the...
Read article 4. 6. 2026Звезды | ЭкзопланетыUnderstanding the orientation of an exoplanet's orbit relative to its host star's rotation provides essential clues about the system's past. A key method for measuring this alignment is the Rossiter-McLaughlin effect, which occurs when a transiting planet blocks different parts of a rotating star, creating a characteristic shift in the star's spectral lines. Researchers have now introduced an improved modelling framework within the exoplanet anal...
Read article 4. 6. 2026Звезды | ЭкзопланетыThe Pan-Pacific Planet Search was a six-year survey that monitored 164 southern evolved stars to detect potential orbiting companions using radial-velocity measurements, which track the slight wobble of a star caused by the gravitational pull of orbiting objects. In their final data release, researchers aimed to resolve the true nature of six speculative candidates that had been identified during the survey.
By combining new radial-velocity da...
Read article 4. 6. 2026Звезды | ЭкзопланетыTWA 5 B is a directly imaged sub-stellar companion, a type of object often categorized as a gas giant or brown dwarf. Understanding the chemical composition of these atmospheres is essential for learning how they formed. Silicon is a particularly important element, as it is a refractory material — a substance that remains solid at relatively high temperatures — and it plays a major role in the formation of magnesium-silicate clouds, which are sim...
Read article 4. 6. 2026ЗвездыProtoplanetary disks, the rotating disks of gas and dust that surround young stars, are the environments where planets are born. Scientists study these disks to understand the chemical ingredients available during planet formation, which can provide clues about the potential for life. A recent investigation has identified a new, complex molecule within the disk surrounding the star TW Hya, known as a Class II disk, which is in a mature phase of d...
Read article 4. 6. 2026Звезды | Экзопланеты | Космический телескоп имени Джеймса Уэбба | Атмосферы планет | СуперземляV1298 Tauri c is a young super-Earth progenitor — an infant version of a planet like those commonly found in our galaxy — orbiting a star about 23 million years old. These young, inflated planets are crucial for understanding how planetary atmospheres form and change over time, unlike older planets whose atmospheres may have already settled. As part of the KRONOS research program, space telescope observations have now analyzed the light passing t...
Read article 4. 6. 2026Звезды | Экзопланеты | ЭкзолуныBeta Pictoris b is a massive gas giant planet directly imaged in orbit around a star, and its orbit is aligned in a way that makes it a prime target for studying potential large moons, known as exomoons. By monitoring the radial velocity — the speed at which the planet moves toward or away from us along our line of sight — of this distant world, researchers aimed to detect the gravitational tug caused by an orbiting moon.
The observations were...
Read article 3. 6. 2026Звезды | ЭкзопланетыThis study investigates the atmospheres of warm and hot mini-Neptunes, specifically Gliese 9827 d and TOI-238 b, which may have water- or metal-rich compositions. It examines how these compositions affect atmospheric photochemistry and mass loss rates, finding that higher water/metal content can significantly reduce atmospheric escape, making these atmospheres more stable over time.
Using the CHAIN model, researchers simulated the upper atmosp...
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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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