Ancient Stars Somehow Survived Close to the Center of the Milky Way - by spacewriter
Artist impression of the ancient stars in the inner region of the Milky Way. Some examples of the orbits of the stars have been highlighted on the left. The right-hand side shows the location of these stars in the Galaxy with respect to the Sun, spinning around slowly. Credit Left background image: ESA/Gaia, artist’s impression: Amanda J. Smith and Anke Arentsen, Institute of Astronomy, Cambridge. CC BY 4.
According to a hierarchical model of galaxy formation, small galactic building blocks formed first, only to coalesce into ever larger galaxies over the lifetime of the Universe. Stars formed early in the process. Courtesy ESO. Both models imply that the very oldest stars in a galaxy should be present in the dense, inner regions. This certainly seems to be true for the Milky Way. And, using spectroscopy, astronomers found that the chemical properties of those ancient stars match those of the earliest stars in the Universe.So, where’s the Milky Way in the hierarchy? It began forming some 13.6 billion years ago and its original “core” was a smaller protogalaxy that became its first nucleus.
México Últimas Noticias, México Titulares
Similar News:También puedes leer noticias similares a ésta que hemos recopilado de otras fuentes de noticias.
Tourist who defaced Colosseum says he wasn’t aware it was ancientThe tourist who infuriated a nation when he was captured scratching a note into the Colosseum claims that he didn’t understand the history of the UNESCO World Heritage site. He apologized and acknowledged its “artistic and historical importance.”
Leer más »
Ancient amber reveals how some birds survived asteroid-induced mass extinctionHow did some avian ancestors survive an astroid mass extinction while others perished? Paleontologists have been attempting to unravel the mystery for decades.
Leer más »
Secrets of our ancient relatives: Neanderthal genes deform miceScientists utilize CRISPR gene editing to insert Neanderthal and Denisovan genes into mice, showing the physical characteristics of extinct relatives.
Leer más »
Huge granite 'body' on far side of the moon offers clues to ancient lunar volcanoesCooled magma deposits have been discovered under a lunar volcano that likely erupted 3.5 billion years ago.
Leer más »
This ancient, Lovecraftian apex predator chased and pierced soft preyHalf a billion years ago, Anomalocaris canadensis probably used its bizarre headgear to reach out and snag soft prey with its spiky clutches.
Leer más »
Dolce & Gabbana Alta Moda Trades Crystals for CrochetThe Fall 2023 collection shown in Puglia celebrates ancient craft traditions.
Leer más »