Tag

Galactic Formation

All articles tagged with #galactic formation

space1 day ago•74 min saved

Milky Way's hidden history: Loki dwarf galaxy eaten, 20 stars reveal its remnants

Astronomers identified a set of 20 metal-poor stars in the Milky Way’s disk whose chemistry and orbits suggest they formed together in a single ancient dwarf galaxy nicknamed Loki, later accreted by the Milky Way. This supports the view that our galaxy built itself by swallowing many small galaxies, with Loki’s remnants offering a window into those early building blocks. The team used high‑resolution spectroscopy, orbital data, and simulations, and note Loki-like systems could still be hidden in the disk; future surveys may reveal thousands more stars with similar origins.

via Space|

#dwarf-galaxy #galactic-formation #loki

science10 months ago•3 min saved

Mysterious Interstellar Object Sparks New Astronomical Discoveries

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.

via Yahoo|

#astronomy #comet-31atlas #galactic-formation

science11 months ago•4 min saved

Webb Telescope Unveils the Formation Secrets of Galactic Disks

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.

via Rude Baguette|

#cosmic-evolution #disk-galaxies #galactic-formation

science1 year ago•2 min saved

Astronomers Discover Mysterious Triple-Ring Galaxy

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.

via Livescience.com|

#astronomy #galactic-formation #galaxies

astronomy2 years ago•2 min saved

"Unveiling the Epic Odyssey: A 10-billion-year Trek to a Distant Black Hole"

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.

via Phys.org|

#astronomy #extragalactic-star #galactic-formation