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The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. [ 1 ] [ 2 ] Its central massive object is a supermassive black hole of about 4 million solar masses , which is called Sagittarius A* , [ 3 ] [ 4 ] [ 5 ] a compact radio source which is almost exactly at the galactic rotational ...
A galactic quadrant, or quadrant of the Milky Way, refers to one of four circular sectors in the division of the Milky Way. In astronomical practice, the delineation of the galactic quadrants is based upon the galactic coordinate system , which places the Sun as the origin of the mapping system .
Sagittarius A*, abbreviated as Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SADGE-AY-star [3]), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way.Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [7] visually close to the Butterfly Cluster (M6) and Lambda Scorpii.
The locations within the Milky Way that have the highest stellar density are the galactic core and the center of globular clusters. A typical mass density for a globular cluster is 70 M Sun pc −3 , which is 500 times the mass density near the Sun. [ 2 ] In the solar neighborhood, the stellar density of a star cluster must be greater than 0.08 ...
Galactic Center of the Milky Way; Active galactic nucleus, of a regular galaxy; Bulge (astronomy), the core of spiral galaxies in general; Central massive object, the mass concentration at the center of a galaxy; Supermassive black hole, the core of most galaxies
In 2022, study coauthor Hans-Walter Rix and his colleagues used Gaia to peer into the heart of the Milky Way and discovered the oldest stars ever found in the galaxy during their “galactic ...
Astronomers believe that about 60% of all galaxies are spiral galaxies — and our solar system resides in one of the spiral arms of the Milky Way galaxy. Webb’s observations can help ...
A second barrier at the core of the Milky Way is first revealed in the motion picture Star Trek V: The Final Frontier. Being the only encounter ever shown, the only known reference is the "Great Barrier". This energy barrier at the core is thought to be impenetrable like the one at the edge of the galaxy; however, it is revealed that only ...