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Latest astronomy noticias
Manténgase al día con las últimas noticias astronómicas, descubrimientos sobre estrellas y exoplanetas, e investigaciones actuales. Explore artículos recientes del mundo de la astronomía.
25. 5. 2026
Estrellas | ExoplaneProxima 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 that many of these flares are phase-locked to the ...
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25. 5. 2026Estrellas | Exoplanetas | Júpiter calienteWASP-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. 2026EstreThis 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. 2026EstreAstronomers 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. 2026EstreHD 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. 2026Estrellas | ExoplaneHD 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...
Read article 22. 5. 2026EstreWR 147 and HD 167971 are massive star systems where strong stellar winds collide, accelerating particles to high energies. These systems, known as particle-accelerating colliding-wind binaries (PACWBs), are expected to produce synchrotron radiation in the radio range, which should be linearly polarized. However, no such polarization has been detected so far. In this study, astronomers used the Very Large Array radio telescope to observe both syst...
Read article 21. 5. 2026Estrellas | ExoplaneCoRoT-2b is a young and unusual hot Jupiter, a giant planet orbiting very close to its star. Using the IGRINS spectrograph on the Gemini South telescope, scientists observed the planet’s dayside just before it passed behind its star. By analyzing the planet’s thermal emission, they detected clear signs of water vapor and carbon monoxide in its atmosphere. The water signal was found with high confidence, and the carbon monoxide was also detected, ...
Read article 21. 5. 2026Estrellas | Exoplanetas | Enanas marrones | TESS | SubgiganteTOI-5882 is a subgiant star that stands out for its unusually high lithium content. The star also hosts a massive brown dwarf companion, which can disturb the orbits of any inner planets. Theoretical models suggest that subgiant stars in a certain mass range can retain lithium signatures if they have recently swallowed a planet. To test this, researchers measured the lithium abundance in TOI-5882 using high-resolution spectra and compared it to a...
Read article 20. 5. 2026Estrellas | Exoplanetas | Supertierras | Exoplanetas habitableGliese 3378 (GJ 3378) is a red dwarf star located just 7.7 parsecs from the Sun. It hosts a planet, Gliese 3378b, which was previously thought to be a super-Earth with a mass of about five Earth masses and an orbital period of nearly twenty-five days. New observations using several high-precision spectrographs, including HPF, NEID, CARMENES, and SPIRou, have led to a revised understanding of this planet’s properties. The updated analysis finds th...
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Exoplanetas recién descubiertos
| 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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