hvězdy
exoplanety
Zprávy
Latest astronomy zprávy
Zůstaňte v obraze s nejnovějšími astronomickými zprávami, objevy o hvězdách a exoplanetách a aktuálním výzkumu. Prozkoumejte čerstvé články ze světa astronomie.
3. 3. 2026
Hvězdy | Exoplanety | TESS | Červení trpaslíciResearchers have detected and validated TOI-1080 b (SIPS J1825-5212 b), a small, temperate exoplanet that transits its quiet M4V host star every 3.97 days. The host star is located 25.6 parsecs away. The planet was first identified by the TESS mission and confirmed with both TESS and ground-based observations. Analysis of the light curves shows that TOI-1080 b has a radius of about 1.2 times that of Earth and an equilibrium temperature of 368 kelvin. Radial velocity measurements set an uppe...
Read article 
Advertisement
3. 3. 2026Hvězdy | Exoplanety | Superzemě | Atmosféry planeScientists have used high-resolution transmission spectroscopy from the Gemini-South telescope to study the atmosphere of the temperate super-Earth exoplanet L 98-59 d. This approach, typically used for larger and hotter planets, was successfully applied to a smaller, more temperate world, demonstrating the capability of ground-based facilities to characterize super-Earth atmospheres.
The team confirmed the presence of hydrogen sulfide (H2S) i...
Read article 2. 3. 2026Hvězdy | Exoplanety | TESS | Červení trpaslíciResearchers conducted the most comprehensive search for planets around mid-to-late M dwarf stars using data from the TESS mission. Surveying over 8,000 such stars, they identified 77 transiting planet candidates and measured how often planets occur as a function of their size, orbital period, and the amount of starlight they receive. The study found that each mid-to-late M dwarf hosts on average about 1.1 planets larger than Earth within 30 ...
Read article 2. 3. 2026Hvězdy | Exoplanety | Atmosféry planet | Vesmírný dalekohled Jamese WebbScientists conducted the most sensitive direct imaging search for the nearby Jupiter-analog exoplanet epsilon Eridani b using the JWST/NIRCam coronagraph between 4 and 5 micrometers. Despite achieving a record-breaking contrast sensitivity at the planet’s expected separation, the planet itself was not directly imaged. The study updated the age of the host star epsilon Eridani to 1.1 billion years, which affects the estimated temperature of t...
Read article 2. 3. 2026Hvězdy | Mladé hvězdné objektyDO Tauri is a classical T Tauri star, a type of young star still surrounded by a disk of gas and dust. Researchers monitored DO Tau using the SPIRou spectropolarimeter at the Canada-France-Hawaii Telescope between 2020 and 2025, aiming to understand its magnetic activity and accretion processes.
The study detected strong, variable magnetic fields in DO Tau, including a rare magnetic polarity reversal—meaning the star's large-sc...
Read article 1. 3. 2026HvězdyYY Herculis is a symbiotic star system that has experienced several brightening events over the past century. In 2021, astronomers observed a hot-type outburst in YY Herculis using the Himalayan Chandra telescope, focusing on changes that occur during the system's secondary minimum.
This study monitored YY Herculis from 2021 to 2023, covering one and a half orbital cycles. Researchers analyzed how the temperature and brightness...
Read article 1. 3. 2026Hvězdy | Červení trpaslíciM dwarfs are small, cool stars that can become tidally deformed when they are part of close binary systems called cataclysmic variables. These distortions change the stars’ shapes and may affect how their magnetic fields are generated. Studying these effects helps scientists understand stellar dynamos and magnetic activity in stars beyond our Sun.
This study examined the relationship between the magnetic cycle period and the rota...
Read article 1. 3. 2026Bílí trpaslíci | HvězdyMira, also known as omicron Ceti, is one of the most famous variable stars known since antiquity — a giant red star located about 300 light-years away that brightens and dims over a cycle of roughly 332 days. It is not alone: Mira has a faint companion called Mira B, thought to be a white dwarf, the dense Earth-sized remnant left behind when a Sun-like star exhausts its nuclear fuel. A new study used observations of rapid brightness flickeri...
Read article 1. 3. 2026PICASO 4.0 is a major update to an open-source tool for simulating the atmospheres of brown dwarfs and exoplanets. The new version adds cloud modeling, photochemistry, and energy injection features, helping scientists better understand these distant worlds.
The update is motivated by recent discoveries from the JWST telescope, which revealed complex chemistry and clouds in exoplanet atmospheres. PICASO 4.0 is benchmarked against ...
Read article 1. 3. 2026Hvězdy | Masivní hvězdy hlavní posloupnostiEta Carinae, a supermassive binary system, is undergoing extreme wind-driven mass loss, producing shock-heated X-ray emitting plasmas. Observations by the XRISM X-ray observatory in 2023 and 2024 captured unprecedentedly detailed spectra in the iron K band (6.2–7.1 keV).
Key findings
- Three velocity components were identified in the hydrogen-like and helium-like iron lines, with maximum velocities of 2000–3000 k...
Top article categories
Filtered articles by category.
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
Latest scientific studies
Projděte si nejnovější vědecké studie o hvězdách a exoplanetách v naší galaxii. Objevte nejnovější výzkumy astrofyziky a hvězdné astronomie.
Další výzkum