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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 zprávy
29. 1. 2026
HvězdyAstronomers using the Keck Planet Finder have detected the most extreme atmospheric winds ever recorded on a gas giant outside our solar system. By observing the ultra-hot Jupiter KELT-9 b as it orbits its star, researchers measured supersonic winds reaching speeds of nearly 12 kilometers per second—over 40,000 kilometers per hour.
These massive winds carry heat from the permanent dayside to the nightside, revealing a complex global climate. The study also identified a cocktail of vaporized ...
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28. 1. 2026HvězdyA new study focusing on the Earth-like exoplanet TRAPPIST-1e suggests that the transition to an oxygen-rich atmosphere, known as the Great Oxidation Event, could occur up to a billion years sooner than it did on our own planet.
While Earth's atmosphere took hundreds of millions of years to accumulate oxygen after the appearance of life, the unique light from M-dwarf stars promotes more efficient ozone formation. This process lowers the barrie...
Read article 28. 1. 2026Hvězdy | Exoplanety | Bílí trpaslíciUsing the James Webb Space Telescope, astronomers have discovered a significant infrared glow around white dwarf star WD 0644+025, an unusually heavy white dwarf located within 25 parsecs of Earth. This excess heat suggests the presence of a giant planet, roughly seven times the mass of Jupiter, orbiting the remains of this dead star.
While white dwarfs are the final stage of stars like our Sun, this particular star is unique because it shows...
Read article 28. 1. 2026Astronomers have discovered a fascinating planet candidate, named HD 137010 b, which bears a striking resemblance to Earth. Located around a bright star similar to our Sun, this world is almost exactly the same size as Earth and orbits its star every 355 days—a year nearly identical to our own. Because it sits at the outer edge of the 'habitable zone,' it receives just enough light and heat that it could potentially host liquid water.
This di...
Read article 27. 1. 2026HvězdyAstronomers have discovered a new giant planet named TOI-6692b, which is similar to Jupiter but follows a much more elongated, eccentric path around its star. While Earth takes a year to orbit the Sun in a nearly circular path, this massive world completes its orbit in 130 days, swinging in and out due to its oval-shaped trajectory.
Initially spotted by a single shadow it cast while passing in front of its star, its existence was confirmed usi...
Read article 6. 1. 2026Hvězdy | Neutronové hvězdyModels favor a neutron star instead of a colder white dwarf. LAMOST J2354+3356 is over 400 light years away, and is the closest neutron star candidate....
Read article 4. 1. 2026Hvězdy | Exoplanety | Hvězdy podobné Slunci | Vesmírný dalekohled Jamese WebbResearchers have compiled detailed spectral energy distributions for 20 stars that hosted exoplanets studied by the James Webb Space Telescope. By measuring the X-ray and ultraviolet light emitted by these stars, the team highlights how intense radiation impacts the atmospheres of orbiting planets. This data includes vital information on stars like Tau Ceti, helping experts better understand the potential for atmospheric loss on these worlds....
Read article 22. 12. 2025Hvězdy | ExoplanetyTOI-1927 b and TOI-2643 b are the first puffy planets known to orbit stars in thick disc of the Milky Way. This is highly unexpected in such metal-poor environment of our galaxy....
Read article 16. 12. 2025Hvězdy | Exoplanety | Superzemě | Červení trpaslíciThese planets could be great targets for study of atmosphere loss on exoplanets close to their active stars....
Read article 8. 12. 2025Hvězdy | Exoplanety | TESS | Horký JupiterTESS phase curve reveals extreme heat with poor redistribution. The planet orbits in a near-polar orbit around its rapidly rotating star...
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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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