Tag Archive for 'Early Milky Way'

Orbits of a few real stars are illustrated on top of the total stellar light of the Milky Way Galaxy. Image credit: S. Khoperskov / AIP.

Astronomers Explore 3D Structure of Milky Way Galaxy

Dec 30, 2024 by News Staff

Using data from the APOGEE survey, astronomers from the Leibniz Institute for Astrophysics Potsdam, the University of Vienna and Paris Observatory have...

An artist’s conception of the Milky Way Galaxy. Image credit: Pablo Carlos Budassi / CC BY-SA 4.0.

Astronomers Find 12- to 13-Billion-Year-Old Stars in Milky Way’s Halo

May 15, 2024 by News Staff

Astronomers at MIT have discovered thee extremely ancient stars in the Milky Way’s halo, a cloud of stars that envelopes the entire main Galactic disk....

This image shows the location and distribution of Shakti (yellow) and Shiva (blue) stars throughout the Milky Way. Image credit: ESA / Gaia / DPAC / K. Malhan.

Astronomers Find Two Ancient Substructures in Inner Milky Way

Mar 22, 2024 by News Staff

Dubbed Shakti and Shiva, the newly-identified structures are between 12 and billion years old — so ancient they likely formed before even the oldest...

The very massive first-generation stars with a mass range from 140 to 260 solar masses are predicted to enrich the early interstellar medium through pair-instability supernovae; decades of observational efforts, however, have not been able to uniquely identify the imprints of such very massive stars on the most metal-poor stars in the Milky Way. Image credit: NAOC.

Galactic Halo Star’s Chemical Signature Indicates Existence of Very Massive Stars in Early Universe

Jun 7, 2023 by News Staff

Early Universe’s stars had up to several hundred solar masses. The earliest stars of 140-260 solar masses became pair-instability supernovae (PISNe)....

An artist’s impression of what the Milky Way might look like seen from above. The colored rings show the rough extent of the Heracles galaxy. The yellow dot shows the position of the Sun. Image credit: Danny Horta-Darrington, Liverpool John Moores University / NASA / JPL-Caltech / SDSS.

Astronomers Find ‘Fossil Galaxy’ Hidden in Depths of Milky Way

Dec 8, 2020 by News Staff

A small satellite galaxy, named Heracles, collided with our Milky Way Galaxy about 10 billion years ago and its remnants account for about one third of...

An artist’s impression of the thin stream of stars torn from the Phoenix globular cluster, wrapping around the Milky Way (left). Wan et al targeted bright red giant stars (right) to measure the chemical composition of the disrupted Phoenix globular cluster. Image credit: James Josephides, Swinburne Astronomy Productions / S5 Collaboration.

Ancient Globular Cluster Was Tidally Disrupted by Milky Way Two Billion Years Ago

Jul 30, 2020 by News Staff

The Phoenix stellar stream, a thin over-density of stars in the halo of our Milky Way Galaxy originally identified by the Dark Energy Survey, is composed...

This artist’s impression shows a Milky Way-type galaxy, surrounded by a large halo of blue, faint light, made of Lyman-alpha photons. Image credit: L. Calçada / ESO.

Photons Struggle to Escape Early Milky Way-Type Galaxies

Jan 11, 2017 by News Staff

An international team of astronomers has discovered enormous halos of blue, faint light — made of so-called Lyman-alpha photons — around early...

This Hubble Space Telescope image shows the star cluster Terzan 5. Image credit: F. Ferraro / NASA / ESA / ESO.

Astronomers: Star Cluster Terzan 5 is ‘Living Fossil’

Sep 7, 2016 by News Staff

Astronomers using ESO’s Very Large Telescope, the NASA/ESA Hubble Space Telescope and the Keck Telescope have revealed the unusual mix of stars in the...