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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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Latest astronomy Новости
27. 5. 2026
Звезды | Экзопланеты | Oбитаемые экзопланетыThis study analyzes the orbital dynamics and habitability of the HD 20794 planetary system, which contains three confirmed planets orbiting a nearby G-type star. Of particular interest is HD 20794 d, a terrestrial planet with a minimum mass of 5.82 Earth masses on a highly eccentric orbit that passes through the star’s habitable zone (HZ). The research calculates the HZ boundaries and determines how much time planet d spends within these limits. N-body simulations show that the system remains dy...
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27. 5. 2026Звезды | ЭкзопланетыScientists modeled the interiors and atmospheres of the exoplanets TRAPPIST-1f, g, and h to see if they could sustain subsurface oceans and produce detectable water vapor through cryovolcanism. Using simulations, they found that all three planets’ internal heat is mainly generated by radioactive decay and tidal forces. TRAPPIST-1f and g are likely to have thin outer ice shells and shallow subsurface oceans, while TRAPPIST-1h may have a thicker ic...
Read article 27. 5. 2026Звезды | ЭкзопланетыResearchers observed the protoplanetary disk around the young star AB Aurigae using near-infrared polarized imaging and H-alpha observations over several years. Their study reveals that while most of the disk follows Keplerian rotation, the inner regions (within about 60 astronomical units) show significant deviations, including sub-Keplerian motion. Two bright spiral arms inside the disk’s millimeter cavity display different dynamic behaviors, p...
Read article 27. 5. 2026Звезды | ЭкзопланетыWASP-156 b is a short-period exo-Neptune, a planet similar in size to Neptune but much closer to its star. Scientists studied the planet’s orbit using new high-precision spectroscopic and photometric observations. They measured the Rossiter-McLaughlin effect, which reveals the angle between the planet’s orbit and the star’s rotation. The results show that WASP-156 b’s orbit is well aligned with the star’s equator, with a projected obliquity of ab...
Read article 25. 5. 2026Звезды | ЭкзопланетыProxima Centauri, the closest star to the Sun, hosts at least two planets: Proxima b and Proxima d. Using high-resolution optical observations, astronomers searched for signs of magnetic interactions between the star and its planets. They measured the star’s rotation period as about 85 days and found that Proxima Centauri experiences frequent flares, with about 5 percent of the observing time showing flare activity. Statistical analysis revealed ...
Read article 25. 5. 2026Звезды | Экзопланеты | Горячий юпитерWASP-33b is an ultra-hot Jupiter, a giant planet orbiting very close to its star. Scientists used high-resolution spectroscopy with the SPIRou instrument to observe eight eclipses of WASP-33b, focusing on the moments when the planet passes behind its star (ingress and egress). This technique, called eclipse mapping, can reveal details about the planet’s dayside atmosphere. The team analyzed the data using advanced software and combined it with pr...
Read article 22. 5. 2026ЗвездыThis study examines how often stars pass close to the Sun and puts the upcoming fly-by of GJ 710 into context. GJ 710 is expected to come within about 0.0621 parsecs (roughly 10,000 astronomical units) of the Solar System in about 1.3 million years, making it one of the closest known future encounters. The researchers analyzed the motions of nearby stars to identify both past and future close approaches within one parsec of the Sun. They correcte...
Read article 22. 5. 2026ЗвездыAstronomers have studied four extremely metal-poor stars, which are among the oldest and most primitive in our galaxy. The main focus is on G256353, a star with a very low iron content and a strong enhancement of elements created by the rapid neutron-capture process, known as the r-process. Using high-resolution spectra from the GHOST instrument on Gemini South, the team measured the abundances of 15 neutron-capture elements in G256353. The patte...
Read article 22. 5. 2026ЗвездыHD 152248 is a massive twin binary system used to study the internal structure of stars more than twenty times the mass of the Sun. By measuring the apsidal motion—the slow rotation of the orbit’s long axis—astronomers can probe how mass is distributed inside these stars. This study uses detailed stellar models to compare predictions with observations, focusing on the internal structure constant k2, which is sensitive to the density contrast betw...
Read article 22. 5. 2026Звезды | ЭкзопланетыHD 38973 is a nearby star similar to the Sun. Astronomers have discovered a planet, HD 38973 b, orbiting this star with a long period of about 2733 days, or roughly 7.5 years. The planet’s mass is estimated to be about a quarter that of Jupiter, placing it in the category of cold Saturns—planets with similar mass and temperature to Saturn in our solar system. The discovery was made using precise measurements of the star’s motion, which revealed t...
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Недавно обнаруженные экзопланеты
| 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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