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Stellar Brief: 22. 10. 2026
A young, planet-hosting star called V1298 Tauri is showing how fiercely active infant planetary systems can be: radio emissions appeared in 90 percent of monitoring visits, while its X-ray brightness also changed and showed a stellar flare.
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14. 4. 2026
SterneHD 163296 is a young star surrounded by a disk of gas and dust where planets are forming. Using the ALMA telescope, scientists detected compact emission of hydrogen sulfide (H2S) and sulfur oxides in the innermost part of the disk. The emission comes from a region just 3–5 astronomical units from the star, where temperatures are high enough for sulfur-bearing ices to turn into gas.
The observations show that H2S is a major sulfur-containing molecule in this region, with a higher or similar ab...
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14. 4. 2026Sterne | Exoplaneten | Sonnähnliche SterneHD 161098 is a Sun-like star located about 30 parsecs away. Using advanced instruments and long-term radial velocity monitoring, scientists have detected two signals that may indicate the presence of planets. The first candidate, HD 161098 b, has a minimum mass of about 3.6 times that of Earth and orbits the star every 72.6 days. The second, HD 161098 c, is more massive, with a minimum mass of about 7.8 Earth masses and an orbital period of 682.5...
Read article 14. 4. 2026Sterne | Exoplaneten | PlanetenatmosphäreHD 25295 b, also known as TOI-4602 b, is a sub-Neptune planet orbiting a bright and quiet star. Precise measurements of its mass and radius show that it is about 2.5 times the size of Earth and 5.5 times as massive. This places it just above the so-called radius valley, a region where few planets are found, and suggests that it is in transition between a sub-Neptune and a super-Earth.
The planet's bulk density indicates that it still has a thi...
Read article 12. 4. 2026Sterne | Exoplaneten | TESSTOI-1710 A b is a warm Neptune-sized planet that orbits its star in the opposite direction to the star's rotation, a configuration known as anti-alignment. This rare arrangement was discovered using the Rossiter-McLaughlin effect, which measures how the planet's transit affects the star's light. The planet's orbit is almost exactly opposite to the star's spin, with a true obliquity of about 158 degrees.
The host star has a distant M-dwarf comp...
Read article 12. 4. 2026Sterne | ExoplaneteWASP-96b is a hot Saturn-like planet whose atmosphere has been studied using both the James Webb Space Telescope and ground-based telescopes. The combined data show clear signs of water vapor, carbon dioxide, and sodium in the planet's atmosphere. While carbon monoxide could not be confirmed, the results suggest that the atmosphere contains two to six times more heavy elements than its star, a property known as super-solar metallicity.
The pla...
Read article 12. 4. 2026Sterne | ExoplaneteScientists used the James Webb Space Telescope to search for exomoons, similar to Earth's Moon, around the rocky planets TOI 700 d and e, which orbit in the habitable zone of a red dwarf star. While no exomoons were detected, the study improved the precision of the planets' orbits and sizes, making future searches more effective.
The team found a noise signal in the data, likely caused by the star's surface activity, which made it harder to de...
Read article 12. 4. 2026Sterne | ExoplaneteWASP-11 b, also known as HAT-P-10 b, is a hot Jupiter with a low density, making it a good candidate for studying its atmosphere. Researchers collected 31 new transit observations and combined them with previous ground-based and space-based data to refine the planet's properties and analyze its orbit over 16 years.
The updated analysis shows that WASP-11 b's orbit is stable, with no signs of orbital decay or additional planets affecting its mo...
Read article 12. 4. 2026Sterne | Exoplaneten | Rote ZwergeA new study has measured the alignment between the spin of an M dwarf star and the orbit of its very-low-mass stellar companion, marking the first such measurement for a double M dwarf system. Using the Rossiter-McLaughlin effect, researchers found that the two stars are well aligned, meaning the companion orbits in the same direction as the primary star spins. This suggests the system either formed aligned or was later realigned by tidal forces....
Read article 12. 4. 2026Sterne | ExoplaneteGJ 436 is a red dwarf star with a Neptune-sized planet, GJ 436 b, orbiting close by. Scientists have long suspected that magnetic interactions between such planets and their stars could produce detectable signals, but direct evidence has been rare. In this study, researchers analyzed 17 years of spectroscopic data and found repeated increases in the star's activity that match the planet's orbital period and the star's rotation.
The team develo...
Read article 12. 4. 2026Sterne | ExoplaneteHATS-75 b is a giant planet orbiting a red dwarf star, recently studied as part of a program using the James Webb Space Telescope. Scientists observed three transits of the planet, where it passed in front of its star, to analyze its atmosphere. The planet's spectrum showed a deeper transit at shorter wavelengths, which can be caused by hazes in the atmosphere or by features on the star's surface, such as starspots and bright regions.
By compa...
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Neu entdeckte Exoplaneten
| 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 | |
| L 115-21 b | 10 / 2026 | 0.4 M⊕ | 41.9 ly | |
| TIC 219893931 b | 09 / 2026 | 8.9 M⊕ | 1319.5 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 |
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