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Stellar Brief

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23. 10. 2026
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Today’s astronomy highlights reveal a striking contrast on exoplanet WASP-43 b: models indicate that its nightside is largely cloudy, while its dayside appears clear at the level where light emerges. The findings offer a new way to compare the planet’s extreme weather with telescope observations.
How sub-Neptunes turn into water worlds by losing their hydrogen
icon13. 2. 2026
iconExoplaneten | Sterne
Image: How sub-Neptunes turn into water worlds by losing their hydrogen
A new study using the BOREAS model reveals how sub-Neptune planets can transform their atmospheres over hundreds of millions of years. By analyzing how different elements escape into space, researchers found that lighter hydrogen is often stripped away while heavier oxygen remains trapped. This process, known as chemical fractionation, can gradually turn a gas-poor envelope into a water-rich atmosphere. The findings suggest that planets like GJ 9827 d may have started with very different composi...
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Secrets of the cold giant 51 Eridani b revealed through high-resolution spectroscopy
icon12. 2. 2026
iconSterne | | Exoplanete
Image: Secrets of the cold giant 51 Eridani b revealed through high-resolution spectroscopy
Using the advanced HiRISE instrument at the Very Large Telescope, astronomers have performed a detailed analysis of 51 Eridani b, one of the faintest directly imaged planets ever found. By measuring the planet's radial velocity across four different time periods, the team successfully mapped its full 3D orbit, breaking previous uncertainties. They discovered that the planet follows a highly stretched, or eccentric, path rather than a circular...
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A second giant planet discovered orbiting the star HD 164604
icon12. 2. 2026
iconSterne | Exoplanete
Image: A second giant planet discovered orbiting the star HD 164604
Astronomers have discovered a new massive giant planet, HD 164604 c, which takes about 15 years to orbit its parent star. By combining data from ground-based telescopes and space missions like Gaia, researchers also refined our understanding of a previously known inner planet in the same system. The study reveals a fascinating orbital dance: the two planets might be moving in opposite directions (a retrograde orbit), suggesting a violent past...
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JWST peers into the freezing atmosphere of the distant giant planet L 97-3 b (WD 0806 b)
icon10. 2. 2026
iconSterne | Exoplaneten | Rote Zwerge | James-Webb-Weltraumtelesko
Image: JWST peers into the freezing atmosphere of the distant giant planet L 97-3 b (WD 0806 b)
Using the James Webb Space Telescope (JWST), astronomers have conducted a detailed analysis of WD0806 b, one of the coldest planets ever photographed outside our Solar System. Orbiting a white dwarf at a massive distance—about 60 times further than Pluto is from our Sun—this gas giant has temperatures of only 350 K (roughly 77°C). The study identified a cocktail of chemicals in its atmosphere, including water, methane, and carbon dioxide. For...
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Confirmation of a second closest habitable zone super-Earth around nearby star Lacaille 9352 (GJ 887)
icon10. 2. 2026
iconSterne | Exoplanete
Image: Confirmation of a second closest habitable zone super-Earth around nearby star Lacaille 9352 (GJ 887)
Astronomers have confirmed a complex multiplanet system orbiting Lacaille 9352 (also Gliese 887, HD 217987) - a bright red dwarf star only 11 light years away. Using high-precision instruments, the team identified two new worlds: a small planet roughly the mass of Earth with a very short 4-day orbit, and a larger 'super-Earth' located within the star's habitable zone, where temperatures could allow for liquid water. This super-Earth, which ta...
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Tracing the chemical ingredients of future planets in the AB Aurigae disk
icon9. 2. 2026
icon
Image: Tracing the chemical ingredients of future planets in the AB Aurigae disk
By studying the swirling disk of gas and dust around the star AB Aur, astronomers are gaining a clearer picture of the raw materials available for building new worlds. Using the NOEMA radio interferometer, researchers measured the ratio of carbon to oxygen—a key indicator of a planet's future atmosphere—by observing specific molecules like carbon monosulfide and sulfur monoxide. The data suggests that this 'planetary nursery' is carbon-rich b...
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The rejuvenated star V658 Carinae: A fast-spinning survivor of cosmic mass transfer
icon8. 2. 2026
iconSterne
Image: The rejuvenated star V658 Carinae: A fast-spinning survivor of cosmic mass transfer
Scientists have uncovered the unusual characteristics of V658 Car, a binary star system that has recently undergone a dramatic 'makeover' through mass transfer. The system consists of a rapidly spinning Be-type star and a smaller, hot companion. The main star is spinning at a staggering 336 km/s—fast enough to fling material into a massive glowing disk that stretches 42 times the radius of our Sun. Surprisingly, the study found that this star...
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Mapping the energetic connection between radio and X-ray emission in Milky Way stars
icon8. 2. 2026
iconSterne | MeerKAT
Image: Mapping the energetic connection between radio and X-ray emission in Milky Way stars
A new study exploring the heart of our Galaxy has identified 137 stars that shine in both radio waves and X-rays, providing a clearer picture of stellar magnetic activity. By combining data from the MeerKAT radio telescope and the eROSITA X-ray satellite, researchers tested the famous Güdel-Benz relation, which usually links a star's heat-driven X-rays to its high-energy radio flares. The findings reveal that many stars in the Galactic plane ...
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How internal gravity waves lead stars to swallow their own giant planets
icon8. 2. 2026
iconExoplaneten | Sterne
Image: How internal gravity waves lead stars to swallow their own giant planets
Recent research into tidal interactions reveals that internal gravity waves within stars play a fundamental role in the fate of 'hot Jupiters' — massive gas giants orbiting very close to their stars. By analyzing how these waves dissipate energy, scientists found that up to 20% of stars similar to our Sun may have already engulfed a large planet, which explains why some stars like TOI-2458 and Gliese 504 rotate faster than expected. The study...
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Secrets of dust growth revealed in the famous PDS 70 planetary laboratory
icon6. 2. 2026
iconALMA | Sterne | Junge Sternobjekte
Image: Secrets of dust growth revealed in the famous PDS 70 planetary laboratory
Using the ALMA telescope, astronomers have captured deep polarization images of the disk surrounding the star PDS 70, a unique system known for hosting two actively forming planets. By analyzing how light scatters off dust particles in the massive ring surrounding the star, researchers discovered that the dust grains are surprisingly small, reaching a maximum size of only about 0.1 millimeters. This suggests that even in environments where pla...
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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
Newly discovered exoplanets
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Latest scientific studies

Durchsuchen Sie die neuesten wissenschaftlichen Studien zu Sternen und Exoplaneten in unserer Galaxie. Entdecken Sie die neuesten Forschungsergebnisse zur Astrophysik und Sternastronomie.

 WASP 121
858 ly
 study icon Detection of Solar-like Oscillations and Granulation at Infrared Wavelengths using JWST
today

WASP-43
284 ly
 study icon The coupled impacts of atmospheric dynamics and cloud microphysics on hot Jupiter atmospheres. I. An application to WASP-43b
today

TOI 3884
141 ly
 study icon A Headwind-like Helium Outflow from TOI-3884b
today

V1298 Tauri
352 ly
 study icon Radio and high-energy variable emission from a multi-wavelength follow-up of the infant planet-hosting star V1298 Tau
yesterday

TYC 5709-354-1
437 ly
 study icon Predictions for an unseen third planet in the WISPIT 2 system
yesterday

TIC 220432308
1129 ly
 +1 study icon Two Validated Planets and 179 Candidates From a TESS Faint Star Transit Search in the ULTRASAT Fields
21. 10. 2026

TOI 431
106 ly
 +4 study icon Thermal Evolution of Lava Planets Across System Ages: Predictions for Hell of a Survey
21. 10. 2026

L 115-21
41.9 ly
 study icon A sub-Earth-sized TESS planet candidate in the nearby M-dwarf binary GJ 774, most likely orbiting GJ 774 A (TIC 351339274)
21. 10. 2026

TOI-3686
841 ly
 study icon TOI-3686: A Hot Jupiter and Sub-Neptune In A 2:1 Mean-Motion Resonance
21. 10. 2026

TOI-270
73.3 ly
 study icon Ammonia-Hydrogen Phase Equilibria in Planetary Envelopes from First-Principles-Based Machine-Learning Molecular Dynamics
21. 10. 2026
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