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.
24. 3. 2026
Hvězdy | ExoplanetyWISPIT 2 is a young star surrounded by a multi-ringed disk, already known to host a giant planet, WISPIT 2b, in a wide gap. This study confirms the existence of a second planet, WISPIT 2c, using new imaging and spectroscopic data from the VLT/SPHERE and VLTI/GRAVITY instruments. The observations reveal a point-like source close to the star, with a K-band spectrum showing features typical of a young giant planet, including carbon monoxide absorption and a continuum shape matching planetary models...
Read article 
Advertisement
23. 3. 2026Hvězdy | Nova | SPHERExGK Persei, a nova that erupted in 1901, continues to surprise astronomers more than a century later. Using data from the SPHEREx space telescope, researchers discovered a large, bipolar shell of molecular hydrogen surrounding the nova. This shell, measuring 18 by 10 arcminutes, matches the shape and location of the known H-alpha nebulosity around GK Persei, which was previously thought to be an ancient planetary nebula.
The hydrogen shell is m...
Read article 23. 3. 2026Hvězdy | ExoplanetyThe Gaia mission’s precise astrometric data has enabled the discovery of new exoplanet candidates, but confirming these planets can be challenging. In 2022, Gaia Data Release 3 (DR3) announced a candidate planet around the bright, Sun-like star HD 12800. However, follow-up observations using the TRES spectrograph failed to detect any evidence of the proposed planet. The data show that if the planet had existed as originally reported, it would hav...
Read article 23. 3. 2026Hvězdy | Exoplanety | Vznik planet | Mladé hvězdné objekty
DX Chamaeleontis (HD 104237) is a binary star system surrounded by a compact, asymmetric ring of dust and gas at a radius of 0.43 astronomical units. This ring lies just outside the binary’s orbit, much closer than expected for a typical circumbinary disk.
Normally, the strong gravity of the binary would clear out the inner region, creating a large gap between the stars and the disk. Previous simulations, assuming the disk orbits in the same ...
Read article 23. 3. 2026Hvězdy | ExoplanetyThe 70 Ophiuchi AB binary system, just 5.1 parsecs from Earth, is a prime target for future searches for Earth-like planets. Astronomers combined new radial velocity data from the Planet Finder Spectrograph with decades of previous measurements and astrometry to refine the orbits and masses of both stars. The study found no evidence for giant planets around either star, but set strong limits on what kinds of planets could still be hiding there.
...
Read article 22. 3. 2026Hvězdy | ExoplanetyHigh-resolution spectroscopy is a powerful tool for studying the atmospheres of exoplanets. This research analyzed 50 transits of 14 different exoplanets, ranging from super-Earths to ultra-hot Jupiters, using data from the SPIRou instrument. The team used automated data reduction and advanced atmospheric retrieval techniques to search for molecular signatures in these planets’ atmospheres.
The study confirmed previous detections of water (H2O...
Read article 22. 3. 2026HvězdyHD 166620 is a star thought to be in a Maunder Minimum-like state, a period of very low magnetic activity similar to what the Sun experienced in the 17th century. Using spectropolarimetric observations from the CFHT/SPIRou and ESPaDOnS instruments, astronomers analyzed the star’s magnetic field over 12 nights. While individual measurements showed no strong polarization, combining the data revealed a weak, axisymmetric dipole field with a strength...
Read article 21. 3. 2026Hvězdy | Exoplanety | TESS | Červení trpaslíci
Ultra-short period (USP) rocky planets, which orbit their stars in less than a day, are rare, especially around red dwarfs. TOI-4552 b (also UPM J1738-4738 b) is a newly validated Earth-sized planet with a 0.3-day orbit around a quiet M4.5V red dwarf just 90 light years away. It was first found in TESS transit data and later confirmed using TESS photometry, ground-based transit observations, and high-resolution imaging, which ruled out false posi...
Read article 21. 3. 2026Vesmírný dalekohled Jamese Webba | Vznik planet | HvězdyThe star HD 163296 is surrounded by a large disk of dust and gas, making it an important target for studying how disks affect the light from background stars. Using the James Webb Space Telescope’s NIRCam coronagraph, astronomers observed HD 163296 and identified several background sources seen through or near the disk. These background stars provide valuable benchmarks for measuring how much the disk dims and reddens starlight—a process known as...
Read article 20. 3. 2026Hvězdy | Exoplanety | Vesmírný dalekohled Jamese Webba | Atmosféry planet | Horký Jupiter
NGTS-2 b is a hot Jupiter with a temperature of about 1,470 Kelvin, orbiting an F-type star in an orbit aligned with the star’s spin. Using the James Webb Space Telescope (JWST), astronomers observed a transit of NGTS-2b and measured its atmosphere’s spectrum from 2.84 to 5.18 micrometers. The spectrum shows weak absorption features from water and carbon dioxide, but the data are not sufficient to precisely determine the planet’s atmospheric comp...
Read article 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