A record-setting blast of gamma rays from a dying star in a distant galaxy has wowed astronomers around the world. The eruption, which is classified as a gamma-ray burst, or GRB, and designated GRB 130427A, produced the highest-energy ...
Astronomy
May 3, 2013
20
0
(Phys.org)—NASA's Swift satellite recently detected a rising tide of high-energy X-rays from a source toward the center of our Milky Way galaxy. The outburst, produced by a rare X-ray nova, announced the presence of a previously ...
Astronomy
Oct 5, 2012
14
0
An international team of astronomers has reported the discovery of a structure thought to be a "protocluster" of galaxies on its way to developing into a galaxy supercluster. Located 11 billion light-years from Earth, the ...
Astronomy
Oct 27, 2021
14
408
In standard cosmological models, the formation of cosmological structures begins with the emergence of small structures, which subsequently undergo hierarchical merging, leading to the formation of larger systems. As the ...
Astronomy
Jan 23, 2024
0
188
Satellite dwarf galaxies at the edges of the Milky Way and neighboring Andromeda defy the accepted model of galaxy formation, and recent attempts to pigeon-hole them into the model are flawed, an international team of scientists ...
Astronomy
Jun 11, 2014
95
0
Data from ESA's Gaia mission is re-writing the history of our galaxy, the Milky Way. What had traditionally been thought of as satellite galaxies to the Milky Way are now revealed to be mostly newcomers to our galactic environment.
Astronomy
Nov 25, 2021
7
3016
A group of MPIA astronomers has managed to identify the "poor old heart of the Milky Way"—a population of stars left over from the earliest history of our home galaxy, which resides in our galaxy's core regions.
Astronomy
Dec 20, 2022
0
639
Astronomers say they have solved an outstanding problem that challenged our understanding of how the universe evolved—the spatial distribution of faint satellite galaxies orbiting the Milky Way.
Astronomy
Dec 19, 2022
31
659
Using data from ESA's Gaia spacecraft, astronomers have discovered a new Milky Way satellite in the constellation Antlia. The newly found dwarf galaxy, named Antlia 2, is several times larger when compared to other systems ...
ESA's Gaia satellite has looked beyond our Galaxy and explored two nearby galaxies to reveal the stellar motions within them and how they will one day interact and collide with the Milky Way – with surprising results.
Astronomy
Feb 7, 2019
4
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