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Latest astronomy zprávy
Zůstaňte v obraze s nejnovějšími astronomickými zprávami, objevy o hvězdách a exoplanetách a aktuálním výzkumu. Prozkoumejte čerstvé články ze světa astronomie.
31. 8. 2026
Hvězdy | Exoplanety | Vesmírný dalekohled Jamese Webba | Atmosféry planeRecent analysis of data from the James Webb Space Telescope, the Hubble Space Telescope, and ground-based observations suggests that the exoplanet Gliese 1132 b is likely a bare rocky world. By examining the light filtering through the planet’s edges as it passes in front of its host star, the data reveals a featureless transmission spectrum, meaning no clear chemical fingerprints of an atmosphere were detected.
The study compared various models, including clear and cloudy atmospheres, agains...
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31. 8. 2026Hvězdy | Exoplanety | KeplerThe star Kepler-50 hosts two known planets that pass in front of their host star from our perspective, an event known as a transit. These two planets are locked in a near-resonant relationship, meaning their orbital periods are mathematically related. Analysis of their transit times reveals small, irregular timing variations, which indicate the presence of a third, non-transiting planet tugging on them through gravity.
Researchers examined dat...
Read article 31. 8. 2026Hvězdy | Exoplanety | TESS | Horký JupiterA new planetary system has been identified orbiting the star TOI-4468, featuring a hot Jupiter and a nearby outer sub-Neptune. This system is unique because it includes a close outer companion to a hot Jupiter without any inner planets, a configuration not typically seen in the current census of known worlds. These findings provide new insights into how these massive, short-period planets form and evolve over time.
The research confirmed the p...
Read article 31. 8. 2026Hvězdy | ExoplanetyTRAPPIST-1 is a small, cool star known for hosting several Earth-sized planets. Because very low-mass stars do not change much over time, they preserve the chemical signature of the cloud of gas and dust from which they formed. Understanding the chemical makeup of such a star provides essential clues about the building materials available to its planets during their formation process.
The chemical composition was determined by analyzing high-r...
Read article 31. 8. 2026Hvězdy | Exoplanety | Atmosféry planeThe young exoplanet V1298 Tauri b is a warm sub-Neptune orbiting a very young orange dwarf star. Recent observations from the James Webb Space Telescope have revealed an atmospheric mystery: the planet contains far less methane than expected, while showing surprising levels of carbon dioxide. This phenomenon, known as the missing methane problem, has been observed in several cool planets, where standard chemical models fail to predict the observe...
Read article 23. 8. 2026Hvězdy | ExoplanetyEclipsing binary stars—systems where two stars periodically pass in front of each other from our perspective—often show small shifts in their orbital timings. These shifts, known as apsidal motion, are sometimes used to search for third objects like planets orbiting both stars. This study evaluates two such systems, CH Ind and SW CMa, to determine if their observed orbital changes truly indicate the presence of external planets or if they are sim...
Read article 23. 8. 2026Hvězdy | ExoplanetyThe exoplanet Gliese 514 b orbits within the habitable zone of a Red dwarf star located approximately 25 light-years from Earth. Because the planet follows an eccentric path—meaning its orbit is more oval-shaped than circular—it experiences significant seasonal changes in the amount of stellar light it receives. These conditions make it an important target for future direct-imaging missions, prompting an assessment of its potential surface climat...
Read article 23. 8. 2026Hvězdy | ExoplanetyNumerical simulations have evaluated whether planets in the 70 Ophiuchi, 36 Ophiuchi, and Gamma Leonis binary systems can remain stable in their habitable zones. The habitable zone is the range of distances from a star where conditions might allow liquid water to exist on a planet's surface. While Gamma Leonis is unlikely to support stable planets due to its extreme orbital dynamics, the 70 Ophiuchi and 36 Ophiuchi systems show promising conditio...
Read article 23. 8. 2026Hvězdy | Exoplanety | Atmosféry planeUnderstanding how planets form requires detailed knowledge of the chemical makeup of their host stars. This study provides a comprehensive analysis of the host stars AF Leporis A and Epsilon Indi A, which are known to harbor cold, directly imaged planets. By examining the light from these stars with high-resolution spectroscopy—a technique that breaks down starlight into its component colors to identify chemical elements—the composition of their ...
Read article 23. 8. 2026Hvězdy | Exoplanety | Vesmírný dalekohled Jamese WebbThe exoplanet HD 80606b is a massive gas giant known for its extreme eccentricity, meaning its path around its host star is highly elongated rather than circular. Because it transits and is eclipsed by its host star, the G5V star HD 80606, it serves as a unique laboratory for studying planetary dynamics. New high-precision data from the James Webb Space Telescope, combined with 25 years of previous radial velocity measurements, were used to exami...
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Nově objevené exoplanety
| 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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