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Stellar Brief: 20. 10. 2026
The planet-forming disk around HD 100546 contains an unexpectedly high amount of methyl formate: ALMA measured a methyl-formate-to-methanol ratio of about 2, hinting that active chemistry is reshaping the ingredients from which planets form.
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24. 2. 2026
Sterne | Exoplaneten | Rote ZwergeA new study reveals that the surface terrain of rocky planets orbiting M-dwarf stars plays a crucial role in their climate and habitability. These planets are often tidally locked, meaning one side always faces the star while the other remains in darkness.
Researchers found that steep mountains and high plateaus create stationary atmospheric waves that disrupt air circulation. This process strengthens winds that carry moisture to the cold nightside, leading to increased cloud formation. Thes...
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23. 2. 2026Sterne | Exoplaneten | Planetenatmosphären | Rote ZwergeAstronomers have conducted the most detailed study to date of GJ 436 b, a famous 'warm Neptune' exoplanet located 33 light-years away. Despite its similarities to our own Neptune, this world orbits its red dwarf star so closely that its year lasts only 2.6 days.
New high-resolution observations found no traces of expected gases like water vapor or methane, leading scientists to conclude that the planet is either shrouded in extremely high-alt...
Read article 23. 2. 2026SterneAstronomers monitoring the active red dwarf AD Leo recently watched for a rare event: a total reversal of its magnetic poles, similar to the 11-year cycle seen on our Sun. However, the 'flip' failed to happen. Instead, the star's magnetic field simplified and strengthened into a more stable configuration.
Despite this lack of a reversal, the study shows that AD Leo is a violent neighbor; it loses mass through stellar winds at a rate ten times...
Read article 23. 2. 2026Sterne | ExoplaneteResearchers have discovered that the magnetic field of the giant planet WASP-18 b plays a dramatic role in controlling its weather. Because the planet is so close to its star, its atmosphere becomes 'ionized' or electrically charged.
This allows the planet's magnetic field to act like a physical brake on high-altitude winds, creating a 'stop and go' effect in the atmospheric flow. This magnetic drag, combined with frictional heating, creates ...
Read article 23. 2. 2026Sterne | Exoplaneten | TESS | Orangefarbener ZwerAstronomers have confirmed the existence of TOI-5734b, a 'hot sub-Neptune' planet orbiting a star slightly smaller and cooler than our Sun. Despite being about twice the size of Earth and nine times its mass, the planet has a density remarkably similar to our home world. This suggests that TOI-5734b is likely a rocky planet that has lost most of its original atmosphere due to the heat of its nearby young star.
Located in a system only about 5...
Read article 22. 2. 2026Sterne | Gaia | Massereiche HauptreihensterneMost massive stars are born within crowded clusters in the flat disk of our Milky Way, yet some are found drifting far above or below this plane. By tracing the movements of 39 high-latitude B-type stars and nearly 450 star clusters using Gaia satellite data, researchers have successfully linked five of these 'orphaned' stars to their original birthplaces.
These stars were likely kicked out of their home clusters millions of years ago at high...
Read article 22. 2. 2026Sterne | Chandra | Sonnähnliche SterneAstronomers using the Chandra X-ray Observatory have achieved a scientific first by resolving the 'astrosphere'—a protective bubble created by stellar winds—around a young, Sun-like star named HD 61005. Located about 119 light-years away, this star is a much more active version of our own Sun as it appeared in its youth.
The study revealed a glowing halo of X-rays extending 220 astronomical units wide, caused by the star's wind crashing into t...
Read article 21. 2. 2026Sterne | ExoplaneteA new study using the ESPRESSO spectrograph has provided a precise look at the giant exoplanet WASP-31 b. Researchers confirmed that the planet’s orbit is nearly perfectly aligned with its star's rotation. While attempting to scan the planet's atmosphere for chemical elements, the team found that the signal was heavily obscured by distortions caused by the planet passing in front of its star. Although previously suggested elements like potassium ...
Read article 21. 2. 2026Sterne | Exoplaneten | TESSResearchers have discovered two new gas giant planets, TOI-883 b and TOI-899 b, which are similar in mass to a 'light' Saturn. These 'warm' giants orbit stars very much like our own Sun with orbital periods of approximately 10 and 11 days.
Despite their similar sizes and environments, the two planets appear to have different internal compositions. This suggests they may have followed different evolutionary paths, providing a unique opportunit...
Read article 16. 2. 2026Sterne | Exoplaneten | Junge Sternobjekte | PlanetenentstehuAstronomers using the ALMA telescope have detected rare molecules of silicon sulfide (SiS) in the dusty disk surrounding the young star PDS 66. This chemical signature is highly unusual because these molecules normally freeze onto dust grains in the cold reaches of a planetary system.
The detection of a warm, compact source of SiS gas about 60 astronomical units from the star suggests the presence of a 'protoplanet'—a planet still in the proc...
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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 | |
| 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 |
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