Todo Sobre Astronomía

Royal Astronomical Society’s NAM 2026: A Flipped Galaxy, a Sun That Switches Off, and a Battle for the Moon’s Far Side For five days, the University of Birmingham has become the busiest crossroads in European astronomy. NAM 2026 has delivered a new way to forecast Solar Cycle 26 seven years early, evidence that our galaxy once flipped, unexplained gas bullets travelling at 20 million mph, and a charged debate over who owns the far side of the Moon.... https://skycr.org/2026/07/22/nam-2026-birmingham/

Balas de gas a casi el 3 % de la velocidad de la luz: se resuelve el misterio de la única nova de helio de la Vía Láctea Un equipo de la Universidad de Warwick ha identificado por primera vez el sistema binario responsable de V445 Puppis, la única nova de helio confirmada en la Vía Láctea, y detectó misteriosos proyectiles de gas eyectados a casi el 3 % de la velocidad de la luz.... https://skycr.org/2026/07/21/balas-de-gas-a-casi-el-3-de-la-velocidad-de-la-luz-se-resuelve-el-misterio-de-la-unica-nova-de-helio-de-la-via-lactea/

A bold new hypothesis reframes JWST’s Little Red Dots as globular clusters caught in the act of being born A team led by John Chisholm has proposed in the Astrophysical Journal Letters that JWST's Little Red Dots — hundreds of compact red sources found in the first billion years of cosmic history — are globular clusters caught during their formation, powered by a short-lived supermassive star. The scenario simultaneously addresses the peculiar spectra of these distant sources and the origin of the multiple stellar populations that define present-day globular clusters.... https://skycr.org/2026/07/20/a-bold-new-hypothesis-reframes-jwsts-little-red-dots-as-globular-clusters-caught-in-the-act-of-being-born/

Una sola idea, dos enigmas: los Little Red Dots del JWST podrían ser cúmulos globulares en pleno nacimiento Un equipo liderado por John Chisholm ha propuesto en Astrophysical Journal Letters que los Little Red Dots del JWST, cientos de fuentes compactas y rojas detectadas en los primeros mil millones de años de historia cósmica, serían cúmulos globulares capturados durante su formación, alimentados por una estrella supermasiva de vida corta. El escenario aborda de un solo golpe los espectros peculiares de estas fuentes distantes y el origen de las poblaciones estelares múltiples que definen los cúmulos globulares actuales.... https://skycr.org/2026/07/20/una-sola-idea-dos-enigmas-los-little-red-dots-del-jwst-podrian-ser-cumulos-globulares-en-pleno-nacimiento/

New ‘exomoon’ detection challenges cosmic labels An international team led by Kevin Hoy has published in Nature the first plausible detection of an exosatellite: a Jupiter-mass object orbiting a brown dwarf companion of the low-mass star CD-35 2722. The find, made with ESO's VLT and the CRIRES+ spectrograph using the radial velocity method, blurs the classical distinction between planets, moons and stellar companions and opens a new chapter for the future Extremely Large Telescope.... https://skycr.org/2026/07/20/first-plausible-exosatellite-around-brown-dwarf-cd-35-2722/

A 91bg-like supernova fainter than any of its class raises new questions about thermonuclear explosions An international team has reported detailed optical and near-infrared observations of SN 2023vjh, a peculiar 91bg-like Type Ia supernova in the elliptical galaxy MCG+04-10-013. The object is unusually faint even for its already-subluminous subclass, and its excess reddening cannot be explained by dust along the line of sight — pointing to possible circumstellar material surrounding the progenitor white dwarf.... https://skycr.org/2026/07/20/sn-2023vjh-peculiar-91bg-like-supernova-unusually-faint/

Qué ver en el cielo del 20 al 26 de julio de 2026 La semana del 20 al 26 de julio ofrece una combinación poco habitual: una Luna que crece noche a noche recorriendo constelaciones cargadas de significado —Virgo, Libra, Escorpio y Sagitario—, el bulbo galáctico prácticamente sobre nuestras cabezas al filo de la medianoche y dos lluvias de meteoros que ya empiezan a activarse en el fondo del cielo.... https://skycr.org/2026/07/19/que-ver-en-el-cielo-del-20-al-26-de-julio-de-2026/

El Sol es más “plateado” de lo que se pensaba: un nuevo modelo revela un 55 % más de plata Un equipo de la Universidad de Uppsala recalcula la abundancia solar de plata con modelos 3D fuera del equilibrio termodinámico local y encuentra un 55 % más de la estimada hasta ahora, cerrando una vieja discrepancia con los meteoritos primitivos.... https://skycr.org/2026/07/18/sol-plata-modelo-3d-no-lte-uppsala/

Galactic PeVatron confirmed: LHAASO J1912+1014u identified as a proton accelerator in the Milky Way Cosmic rays reaching peta-electronvolt energies have been recorded on Earth for decades, but the galactic sources capable of accelerating them — the elusive "PeVatrons" — have long resisted identification. A new study led by Tsunefumi Mizuno (Hiroshima Astrophysical Science Center), published on July 16, 2026 in The Astrophysical Journal, confirms LHAASO J1912+1014u as a proton PeVatron. Located near Altair in the constellation Aquila and originally considered a supernova-remnant candidate, the source was tested with a combined Fermi-LAT, FUGIN, and Chandra multiwavelength analysis. The results point unambiguously to a hadronic accelerator, providing one of the cleanest confirmations to date of a galactic PeV proton engine and offering a template to identify the dozens of other PeVatron candidates already catalogued by LHAASO.... https://skycr.org/2026/07/17/proton-pevatron-lhaaso-j1912/

First atmosphere detected on a rocky planet in the habitable zone of a nearby star Astronomers using the Magellan Clay telescope have detected helium escaping from LHS 1140 b, a rocky super-Earth 48 light-years away in the habitable zone of a red dwarf. Published in Science, the result is the first direct atmospheric detection on a rocky exoplanet in a habitable zone, and it implies the atmosphere is being replenished from the planet's interior.... https://skycr.org/2026/07/16/first-atmosphere-detected-on-a-rocky-planet-in-the-habitable-zone-of-a-nearby-star/

Química de un mundo alienígena en el meteorito que perforó una casa de Nueva Jersey Una condrita carbonácea CM1/2 que atravesó una casa en Nueva Jersey preserva la química de un asteroide primitivo: salmueras concentradas, aminoácidos y compuestos organometálicos que conectan la astroquímica con el origen de la vida en la Tierra. El análisis forense se publica en Science Advances.... https://skycr.org/2026/07/16/quimica-de-un-mundo-alienigena-en-el-meteorito-que-perforo-una-casa-de-nueva-jersey/

Un astrofísico costarricense identifica un candidato a arco gravitacional en datos del James Webb Homer Dávila Gutiérrez, director de SKYCR.ORG, ha identificado un candidato a arco gravitacional en el cúmulo de galaxias MACS J0308.9+2645 a partir de datos públicos del telescopio espacial James Webb. El objeto no había sido reportado previamente y se encuentra a un redshift fotométrico cercano a 4.4. El preprint está disponible en arXiv y el manuscrito se encuentra en revisión en Publications of the Astronomical Society of Japan.... https://skycr.org/2026/07/16/candidato-arco-gravitacional-macs-j0308-jwst/

Reading the Magnetic Signature of a Cosmic Explosion: The VLA’s First Look at GRB 260310A For the first time, astronomers have decoded the magnetic environment surrounding a gamma-ray burst. Using the NSF VLA, a team led by the University of Arizona and the University of Utah detected polarized radio emission and wavelength-dependent Faraday rotation in the afterglow of GRB 260310A — signatures that point to a dense, magnetized HII region carved out by the massive progenitor star. The measurement turns the GRB afterglow into a direct laboratory for probing the magnetic fields that power the universe's most violent explosions.... https://skycr.org/2026/07/15/reading-the-magnetic-signature-of-a-cosmic-explosion-the-vlas-first-look-at-grb-260310a/

The mystery of kilonova late-time infrared glow A new study shows that exotic dust grains made of refractory r-process elements like tungsten and osmium can naturally explain the puzzling late-time infrared glow observed in kilonovae, opening a new window into heavy-element production in neutron star mergers.... https://skycr.org/2026/07/14/the-mystery-of-kilonova-late-time-infrared-glow/

Descubren deslizamientos masivos en Plutón por primera vez Un reanálisis de datos de New Horizons revela seis grandes deslizamientos en Plutón cerca de Sputnik Planitia, marcando los primeros movimientos gravitacionales de masa confirmados en el planeta enano.... https://skycr.org/2026/07/13/descubren-deslizamientos-masivos-en-pluton-por-primera-vez/

Massive landslides discovered on Pluto for the first time A reanalysis of New Horizons data reveals six large landslides on Pluto near Sputnik Planitia, marking the first confirmed gravitational mass movements on the dwarf planet.... https://skycr.org/2026/07/13/massive-landslides-discovered-pluto-first-time/

Gravitational waves expose hidden families of merging black holes Two independent studies published in Physical Review Letters reveal that merging black holes separate into at least three distinct subpopulations, each with different masses, spins, and formation histories. The findings confirm that some black holes are themselves the products of previous mergers.... https://skycr.org/2026/07/12/gravitational-waves-expose-hidden-families-merging-black-holes/