Noticias y novedades sobre astronomía escritas por el periodista especializado Hernán Julio
This gorgeous image resembles an inky patch of space that has been smudged by a giant celestial thumbprint. Actually the object is a planetary nebula named PN M 2-53. It was imaged using the Gemini North telescope of the international Gemini Observatory, a Program of NSF’s NOIRLab. Planetary nebulae have a wildly misleading name, as they have nothing to do with planets — or even exoplanets. The misnomer originates from the late 1700s, when astronomers thought that the gaseous structures resembled planets. Planetary nebulae are actually formed by some dying stars, right at the end of their lives. The layers of gas and dust shed by the dying stars are lit by their remaining cores, creating a planetary nebula. Despite its inaccuracy, the name has stuck!
Esta preciosa imagen parece un parche de tinta en el espacio, difuminado por una gigante huella de un pulgar celestial. En realidad, este objeto es una nebulosa planetaria llamada PN M…
This gently glowing area of sky is actually a hot bubble of hydrogen gas — named Sh 2-305 — that has been bombarded by intense radiation from nearby stars. Such gas clouds are known as emission nebulae, or HII regions (pronounced “H-two”). The radiation in question is in the ultraviolet part of the spectrum and is thought to emanate from at least two O-type stars, and likely several others. This stellar class is the brightest and hottest that we know of — such stars can be up to 90 times as massive as the Sun, and an incredible one million times as bright. Together with five neighbouring bubbles, Sh 2-305 belongs to a giant complex of dense clouds of dust and gas and, on a larger scale, an enormous ring called the GS234-02 star-forming supershell (located in the Perseus arm of the Milky Way, in the constellation of Puppis). This image was obtained under the ESO Cosmic Gems programme, an outreach initiative to produce images of interesting, intriguing or visually attractive objects using ESO telescopes, for the purposes of education and public outreach. The programme makes use of telescope time that cannot be used for science observations. All data collected may also be suitable for scientific purposes, and are made available to astronomers through ESO’s science archive.
Esta zona de cielo ligeramente brillante es, en realidad, una burbuja caliente de gas de hidrógeno (llamada Sh 2-305) que ha sido bombardeada por la intensa radiación de estrellas cercanas.…
El rover Perseverance de la NASA en Marte usó uno de sus dos micrófonos para escuchar a Ingenuity mientras volaba por cuarta vez el 30 de Abril de 2021. Un…
Esta imagen detallada muestra a Abell 3827, un cúmulo de galaxias que ofrece una gran cantidad de interesantes posibilidades de estudio. El Hubble lo observó para estudiar la materia oscura,…
Mientras la carrera por llegar a Marte recrudece entre las nuevas potencias del escenario mundial, el planeta rojo ha decidido acercarse a la Luna y brillar junto a ella…
This Picture of the Week appears to show a lone antenna gazing at the sky — but in reality this antenna is far from lonely. It is part of the Atacama Large Millimeter/submillimeter Array (ALMA), a telescope that comprises 66 high-precision antennas spread out across the Chajnantor plateau, located high up in the Chilean Andes. In this image we are treated to a spectacularly multi-coloured view of the sky above ALMA: green airglow hovers above the horizon, the Large Magellanic Cloud peeks out from behind the antenna, and the magnificent sprawl of the Milky Way stretches out overhead. These antennas are optimised to collect light at millimetre wavelengths, between infrared and radio waves, giving ALMA a view of the Universe that is very different to our own. Human eyes have evolved to see visible light while ALMA views the cosmos at longer wavelengths, picking up light from some of the coldest objects in the Universe — dense star-forming clouds, discs of debris around newborn stars, distant galaxies, and more. ALMA can probe these objects with unprecedented sensitivity and resolution. The array has observed Einstein Rings, imaged protoplanetary discs, and detected complex organic molecules within such discs, suggesting that the Solar System may not be unique in its ability to foster life.
Esta imagen parece mostrar una antena solitaria mirando al cielo, pero en realidad esta antena está lejos de estar sola. Forma parte de ALMA (Atacama Large Millimeter/submillimeter Array), un telescopio formado por…
El pasado miércoles 5 de mayo, el Starship Número de Serie 15 (SN15) completó con éxito la quinta prueba de vuelo a gran altitud de esa nave prototipo de…
Sextans B is an irregular dwarf galaxy, meaning that it is irregularly shaped and smaller than our galaxy, the Milky Way. It lies around 4.5 million light-years from Earth and is located in the constellation Sextans in the southern sky. Captured with the Nicholas U. Mayall 4-meter Telescope, this image of Sextans B features red-colored star-forming regions near the galaxy’s center. Surrounding the galaxy are several bright stars that are located much closer to us in our galaxy, identified by the crisscross patterns created by light interacting with the structure of the telescope, as well as numerous fuzzy-looking background galaxies that appear small because they are much farther away than Sextans B.
Esta imagen de la galaxia enana Sextans B contiene una colección de objetos astronómicos, desde estrellas brillantes en primer plano, hasta galaxias distantes escondidas en el fondo. En esta galaxia…
Do you ever get the feeling that you're being watched? This friendly-looking object is the result of two galaxies merging into one another, complete with a pair of eyes hiding two growing supermassive black holes and a swirling grin. Such mergers are rare in our galactic neighbourhood; Mrk 739 is close enough (astronomically speaking) to study the event in detail, and thus gain a better understanding of the dramatic processes that take place during these cosmic mergers. By using the MUSE instrument on ESO’s Very Large Telescope, the team of astronomers, led by master’s student Dusán Tubín at the Pontificia Universidad Católica de Chile, were able to study the effects of both the merger and the radiation emitted by the growing gigantic black holes. Their study answers questions about the motion of the galaxies, the age of their stars, and the elements they are made up of. They have found that one of these galaxies is much older than its companion, and that their merging process is at an early stage. MUSE is a 3D spectrograph that takes images — known as “datacubes” — of the object being observed over thousands of wavelengths. With MUSE, astronomers are therefore able to map in great detail the properties of the objects they study, because each individual pixel contains an impressive amount of information. Obtaining these exciting insights into galaxy merging and evolution with MUSE is enough to make anyone smile.
¿Alguna vez ha tenido la sensación de que le están vigilando? Este objeto de aspecto amigable es el resultado de dos galaxias fusionándose entre sí, con una sonrisa arremolinada y…
La última pieza del cohete SLS de la NASA que enviará la misión Artemisa I de la NASA a la Luna (posiblemente este año 2021) ha llegado al Centro Espacial…
