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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
3. 2. 2026
Using a sophisticated new technique to clean up astronomical data, researchers have successfully confirmed the presence of a two-planet system orbiting the nearby red dwarf star Gl 725 B, located just 11.4 light-years away.
The study utilized the WAPITI method to remove 'noise' caused by Earth's own atmosphere, allowing for a much clearer view of the planets' gravitational tugs. The results verify the existence of a 'Super-Earth' with 3.5 times the mass of our world, situated comfortably wit...
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3. 2. 2026Atmosféry planet | ExoplanetyThe rocky super-Earth 55 Cancri e is a world of extremes, featuring a global magma ocean with temperatures exceeding 3000 K. Recent findings suggest this planet possesses a carbon-rich atmosphere likely created by gases escaping from its molten interior.
This study reveals that tidal heating—internal friction caused by the star's gravity—acts as a crucial engine that keeps the planet's surface molten and prolongs the release of gases like car...
Read article 3. 2. 2026Exoplanety | TESS | Obyvatelné exoplanetyA new study has investigated the long-term stability and habitability of the TOI-700 system, a rare planetary family containing two Earth-sized worlds located within their star's habitable zone. Using advanced computer simulations, researchers analyzed how the gravity of these tightly packed planets affects their orbits and rotation over billions of years.
The findings show that while planetary interactions are stable enough to allow for surf...
Read article 3. 2. 2026Exoplanety | ALMA | HvězdyScientists using the ALMA observatory have confirmed the presence of significant turbulence within the protoplanetary disk—a swirling ring of gas and dust—surrounding the young star DM Tau. By analyzing millions of computer models against high-resolution observations of carbon monoxide gas, they found that the gas moves faster than can be explained by temperature alone.
This 'non-thermal' movement, or turbulence, is roughly 40% of the speed of...
Read article 1. 2. 2026Astronomers have captured a rare and powerful superflare on the star HD 22468 using the SVOM mission's hard X-ray camera. This massive explosion released an incredible amount of energy, estimated at up to 1.7e38 ergs, and heated plasma to temperatures exceeding 100 million degrees Kelvin—far hotter than the Sun's core. Observations taken shortly after the peak revealed material moving at speeds of 96 kilometers per second, suggesting either a vio...
Read article 1. 2. 2026Scientists have conducted a detailed study of HD 81809, a nearby binary system consisting of two stars very similar to our Sun. By using data from the TESS space telescope and ground-based spectroscopy, researchers discovered that these two stars have surprisingly different chemical compositions despite being born together.
The primary star is a subgiant that is older and metal-poor, while the secondary star appears to have a composition simi...
Read article 1. 2. 2026Exoplanety | TESSAstronomers using the 'sherlock' pipeline have uncovered two new rocky planets, TOI-237 c and TOI-4336 A c, hidden in data from the TESS space telescope. These planets are roughly 20% larger than Earth and orbit small, cool stars known as M dwarfs. TOI-237 c is a particularly hot world that zips around its star in just 1.74 days, while TOI-4336 A c resides in a complex triple-star system with an orbital period of about 7.6 days. Both planets are ...
Read article 30. 1. 2026Hvězdy | Exoplanety | Horký JupiterAstronomers have conducted a detailed study of the scorching dayside of WASP-33 b, a giant gas planet much hotter than any planet in our solar system. By analyzing light captured during eclipses, the team discovered a thermal inversion layer where the atmosphere actually gets hotter with altitude, similar to how Earth's stratosphere behaves.
The findings reveal a complex chemical cocktail including water vapor, carbon monoxide, and likely tit...
Read article 30. 1. 2026Exoplanety | TESS | Červení trpaslíci | SuperzeměAstronomers using the high-precision ESPRESSO spectrograph have detailed two fascinating planetary systems orbiting small, cool red dwarf stars. Around the star TOI-4336 A, they found a rocky super-Earth and a gaseous sub-Neptune, the latter of which is a prime candidate for future atmospheric study.
Meanwhile, the star TOI-4342 hosts two sub-Neptunes of nearly identical size but different densities, along with a newly detected third planet—a...
Read article 30. 1. 2026Astronomers have discovered a new planet in the HD 176986 planetary system, located about 91 light-years away from our Sun. Using high-precision instruments to filter out stellar activity, researchers identified a third world joining the two previously known super-Earths.
This new planet, HD 176986 d, orbits its star every 61 days and is nearly seven times more massive than Earth. All three planets in this system are classified as super-Earth...
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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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