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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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27. 2. 2026
Sterne | Exoplaneten | Braune Zwerge | PlanetenentstehuResearchers have successfully identified 23 nearby young objects, mostly brown dwarfs, that are surrounded by circumstellar disks of gas and dust. By analyzing data from several space missions and ground-based telescopes, the study found that these disks—the birthplaces of potential rocky planets—exist even around very low-mass objects.
Highlights include the detection of ten entirely new disk-bearing candidates and evidence of long-lived accretion in the 20-million-year-old object DENIS-P J0...
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27. 2. 2026Sterne | ExoplaneteThe Sun-like star GJ 504 presents a cosmic mystery: despite being roughly 2 billion years old, it rotates rapidly and possesses an intense magnetic field typical of a much younger star. This study investigates the theory that GJ 504 'rejuvenated' itself by swallowing a Jupiter-sized planet.
By mapping the star's magnetic field and simulating its stellar winds, researchers found that the star's current high-energy state and rotation speed cann...
Read article 27. 2. 2026Sterne | Junge SternobjekteThis research investigates how young stars grow by pulling in material from their surrounding environment, specifically within the DF Tauri binary system. By using high-resolution observations, astronomers analyzed the primary star in this pair to see if its companion affects how it 'feeds' on gas and dust.
They found that despite being part of a double-star system, the primary star follows a traditional growth model where a strong magnetic f...
Read article 27. 2. 2026Sterne | Exoplaneten | TESS | Rote Zwerge | SupererdeA comprehensive search of over 8,000 small, cool stars known as mid-to-late M dwarfs has revealed that these stars are the most common hosts for small planets in our galaxy. Unlike larger stars like our Sun, which typically show a clear 'radius valley'—a gap where planets of a specific size are rarely found—these small stars host a continuous range of planet sizes peaking at about 1.25 times the size of Earth.
The study found that rocky 'supe...
Read article 26. 2. 2026SterneThis study examines the atmospheric behavior and chemical composition of five well-known Mira-type variable stars: RY Cep, SU Cam, T Cep, V667 Cas, and OR Cep.
These aging stars undergo dramatic pulsations that create powerful shockwaves in their atmospheres, leading to the appearance of specific emission lines in their light spectra. By analyzing these spectroscopic changes, the research explains how the balance between carbon and oxygen det...
Read article 26. 2. 2026Sterne | Junge Sternobjekte | GaiUsing the Very Long Baseline Array, researchers have conducted a detailed survey of young stellar objects within the Orion complex to map its three-dimensional structure with unprecedented precision. By detecting 216 compact radio sources and tracking the movement of 58 of them over multiple epochs, the study successfully measured their distances and motions.
The findings reveal that the Orion complex spans distances from 380 to 440 parsecs, p...
Read article 25. 2. 2026Sterne | Exoplaneten | PLATO | TESSAstronomers have successfully characterized three new 'warm Jupiters'—gas giant planets similar in size to Jupiter but with much longer orbits than the typical 'hot Jupiters' found close to their stars.
Using data from the TESS space telescope and the new PLATOSpec instrument, the team identified TIC 147027702 b, which orbits its star every 44 days; TIC 245076932 b, a planet with a notably oval-shaped, eccentric orbit and a 21-day period; and...
Read article 24. 2. 2026Sterne | Exoplaneten | PlanetenentstehuAstronomers have conducted a detailed study of AT Pyx, a young star surrounded by a planet-forming disk located inside a unique environment called a cometary globule. Using advanced instruments like the VLT and ALMA, researchers discovered that the disk is not perfectly circular but eccentric, featuring distinct spiral arms that may be shaped by a hidden planet with a mass anywhere from a fraction of Jupiter up to three times its size.
The stu...
Read article 24. 2. 2026Sterne | Junge Sternobjekte | ExoplaneteA detailed survey of the young star MWC 480 has revealed a massive disk of dust and gas where new planets are likely forming. By combining data from the ALMA and VLA telescopes, researchers identified a prominent dust ring located 95 astronomical units from the star—more than double the distance of Pluto from our Sun. This specific ring contains enough solid material to build the cores of several giant planets.
The study also discovered a new...
Read article 24. 2. 2026Sterne | Exoplaneten | | PlanetenatmosphäreAstronomers have successfully analyzed the atmosphere of HAT-P-44 b, a gas giant similar in size and temperature to Saturn, located in a tight orbit around its star. Using the William Herschel Telescope, the team detected the chemical signature of sodium and found evidence of water vapor within the planet's envelope.
The findings suggest the planet has a relatively clear atmosphere at high altitudes, free from thick clouds, and a chemical com...
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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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