All articles tagged with #galactic formation
Comet 31/ATLAS is only the third interstellar object observed in our solar system, potentially originating from the ancient thick disk of the Milky Way and possibly being around 7 billion years old, offering a unique glimpse into the galaxy's early formation and the nature of interstellar objects.
Using the James Webb Space Telescope, astronomers studied disk galaxies to understand their formation, revealing that galaxies typically form a thick disk first, followed by a thin disk, with the timing influenced by galaxy mass. This supports the turbulent gas disk hypothesis and provides new insights into galactic evolution over billions of years.
Astronomers using Japan's Subaru Telescope have discovered a rare triple-ring galaxy 800 million light-years away, challenging existing galaxy classification systems like the Hubble sequence. The formation of ring galaxies remains a mystery, with theories suggesting they result from galactic collisions or resonance phenomena. This discovery could lead to a better understanding of galactic formation and evolution.
A new study reveals that a star located near the supermassive black hole at the center of the Milky Way galaxy originated from outside the galaxy, marking the first time an extragalactic star has been found in the vicinity of a supermassive black hole. The star, known as S0-6, is estimated to be 10 billion years old and has a chemical composition similar to stars found in small galaxies outside the Milky Way. Researchers suggest that S0-6 was likely born in a now extinct small galaxy that was absorbed by the Milky Way, providing observational evidence that some stars near supermassive black holes formed outside their host galaxies.