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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.
4. 6. 2026
Hvězdy | Exoplanety | Vesmírný dalekohled Jamese Webba | Atmosféry planet | SuperzeměV1298 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 through this planet's atmosphere to identify its co...
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4. 6. 2026Hvězdy | Exoplanety | ExoměsíceBeta 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. 2026Hvězdy | ExoplanetyThis 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...
Read article 3. 6. 2026Exoplanety | HvězdyScientists have taken a closer look at an exoplanet called WASP-18 b, refining its orbit and investigating whether a second planet, WASP-18 c, truly exists.
Using a vast amount of data from various telescopes and databases, they precisely measured WASP-18 b's orbit and its timing. This high-precision data is crucial for detecting any subtle changes in its orbit over time.
Additionally, they analyzed numerous measurements of radial velocity,...
Read article 31. 5. 2026Hvězdy | Exoplanety | Hnědí trpaslíci | TESSAstronomers discovered and characterized TOI-7154b, a massive brown dwarf orbiting close to its host star, TOI-7154. Initially flagged as a planet candidate by TESS, follow-up radial velocity measurements revealed its true sub-stellar nature. TOI-7154b is nearly as massive as the hydrogen-burning limit that separates brown dwarfs from very low-mass stars, but its radius is smaller than Jupiter’s. The brown dwarf orbits a metal-rich G-type star in...
Read article 31. 5. 2026Hvězdy | ExoplanetyResearchers combined space-based K2 and TESS photometry with high-resolution HERMES spectroscopy to study four bright stars: HD 73135, BD +19° 2045, BD +19° 2046, and TYC 1395-855-1. Their analysis clarified the stars’ variability, chemical properties, and evolutionary status. HD 73135 shows a persistent modulation near 1.5 days, likely due to rotation, but an ellipsoidal-binary scenario is also possible. BD +19° 2045 is identified as a new candi...
Read article 31. 5. 2026Hvězdy | ExoplanetyResearchers have upgraded the Exo-REM atmospheric model to better simulate the complex, patchy clouds found in brown dwarfs and exoplanets. The new Exo-REM k26 grids include a cloud sedimentation parameter, improved molecular opacities, and stricter convergence criteria, allowing for more accurate modeling of objects with heterogeneous cloud cover. Applying this model to VHS 1256 b, a variable brown dwarf, the team found that a two-column approac...
Read article 30. 5. 2026Hvězdy | ExoplanetyResearchers analyzed data from Kepler, TESS, and HARPS-N to study KIC 9139163, a solar-type pulsating star. They found evidence for a close-in, non-transiting planet with a mass of about 7.3 Earth masses and a radius of 2.43 Earth radii, placing it in the so-called Neptunian desert—a region where such planets are rare. The planet likely has a water-rich composition and may have lost its original hydrogen/helium envelope or developed a metal-rich ...
Read article 30. 5. 2026Hvězdy | ExoplanetyHD 142527’s planet-forming disk is famous for its asymmetric dust trap, shadows, and spiral arms. Using new ALMA observations, researchers mapped a wide range of molecules and found that emissions from H₂CO, CN, and C₂H are concentrated in spiral-like features in the southern disk, opposite the dust trap. These features are not linked to the disk’s shadows but are likely caused by late infall of carbon-rich material, which boosts the local carbon...
Read article 30. 5. 2026Hvězdy | ExoplanetyAU Mic is a young, nearby star with two Neptune-sized planets and a debris disk. Researchers observed back-to-back transits of both planets, AU Mic b and c, using multiple telescopes and measured their spin-orbit alignment with the Rossiter-McLaughlin effect. They confirmed that planet b’s orbit is well aligned with the star’s rotation, while planet c’s orbit is likely aligned but a polar orbit cannot be ruled out due to data limitations.
The ...
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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 |
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