Noticias y novedades sobre astronomía escritas por el periodista especializado Hernán Julio
En un estudio publicado recientemente, los investigadores de la NASA utilizaron datos de seguimiento de precisión de la nave espacial Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer ( OSIRIS-REx ) para comprender mejor…
This artist’s impression shows L 98-59b, one of the planets in the L 98-59 system 35 light-years away. The system contains four confirmed rocky planets with a potential fifth, the furthest from the star, being unconfirmed. In 2021, astronomers used data from the Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations (ESPRESSO) instrument on ESO’s VLT to measure the mass of L 98-59b, finding it to be half that of Venus. This makes it the lightest planet measured to date using the radial velocity technique.
Un equipo de astrónomos ha utilizado el Very Large Telescope, del Observatorio Europeo Austral (VLT de ESO), en Chile, para arrojar nueva luz sobre los planetas que hay alrededor de…
En 2022, los diseños de robótica de los estudiantes universitarios pueden saltar, deslizarse, gatear, volar en globo, dar vueltas, levitar o dar un salto hacia la victoria, mostrando técnicas alternativas…
This illustration depicts a planet partially hidden in the glare of its host star and a nearby companion star. After examining a number of binary stars, astronomers have concluded that Earth-sized planets in many two-star systems might be going unnoticed by transit searches, which look for changes in the light from a star when a planet passes in front of it. The light from the second star makes it more difficult to detect the changes in the host star’s light when the planet passes in front of it.
Posiblemente algunas búsquedas de exoplanetas podrían estar descartando casi la mitad de los planetas del tamaño de la Tierra que orbitan otras estrellas, de acuerdo a nuevos hallazgos realizados por…
Gracias al Atacama Large Millimeter / submillimeter Array (ALMA) investigadores descubrieron un viento galáctico titánico impulsado por un agujero negro supermasivo hace 13.100 millones de años. Este es el ejemplo…
Las estrellas en explosión generan espectaculares espectáculos de luz. Los telescopios infrarrojos como Spitzer pueden ver a través de la neblina y dar una mejor idea de la frecuencia con la…
The detection of the heavy metals iron (Fe) and nickel (Ni) in the fuzzy atmosphere of a comet are illustrated in this image, which features the spectrum of light of C/2016 R2 (PANSTARRS) on the top left superimposed to a real image of the comet taken with the SPECULOOS telescope at ESO’s Paranal Observatory. Each white peak in the spectrum represents a different element, with those for iron and nickel indicated by blue and orange dashes, respectively. Spectra like these are possible thanks to the UVES instrument on ESO’s VLT, a high-resolution spectrograph that spreads the line so much they can be individually identified. In addition, UVES remains sensitive down to wavelengths of 300nm. Most of the important iron and nickel lines appear at wavelengths of around 350nm, meaning that the capabilities of UVES were essential in making this discovery.
Un nuevo estudio, realizado por un equipo belga que ha utilizado datos del Very Large Telescope del Observatorio Europeo Austral (VLT de ESO) ha demostrado que hay hierro y níquel…
Space can be a lonely place. But not so for this quartet of galaxies making up HCG 86 and observed here with ESO’s VLT Survey Telescope (VST). The four galaxies located approximately 270 million light years from Earth in the Sagittarius constellation, are seen from Earth as arranged in triangular shape, with three of them on a straight line and one underneath; the bright objects to the right of the elongated galaxy are not part of the quartet. HCG stands for Hickson Compact Group, and is used to describe groups of four to ten galaxies where members are physically very close to each other. Because of their compactness, such groups are ideal environments to study galactic interactions, which can sometimes lead to galaxies merging with each other. This image of HCG 86 was taken by a team of astronomers led by Rossella Ragusa of the Istituto Nazionale di Astrofisica in Italy as part of the VST Early-type Galaxy Survey (VEGAS) programme. “With VST we are able to investigate very faint structures in the galaxies' outskirts, which are the relics of past gravitational interactions and merging events,” says Ragusa. In particular, by mapping the light distribution in and around the group’s galaxies in this study, the team concluded that these faint structures are the leftovers of satellite galaxies gobbled by the group approximately seven billion years ago. Located at ESO’s Paranal Observatory in Chile, the VST is one of the world’s largest survey telescopes, devoted to mapping the sky in visible light wavelengths. 2021 marks the anniversary of its first decade of operation, a period during which it has helped to search for planets outside the Solar System and probe the structure of our galaxy and the wider Universe.
El espacio puede ser un lugar solitario. Pero no es así para este cuarteto de galaxias que componen HCG 86, observadas aquí con el VLT Survey Telescope (VST) de ESO. Las cuatro…
Por primera vez, los astrónomos han descubierto evidencias de vapor de agua en la atmósfera de Ganímedes, la luna de Júpiter. Este vapor de agua se forma cuando el hielo…
El centro de esta imagen captada por el Telescopio Espacial Hubble de la NASA y la ESA está enmarcado por los arcos reveladores que resultan de una gran lente gravitacional,…
