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The Milky Way is the galaxy that includes the Solar System, with a diameter of 26.8 ± 1.1 kiloparsecs (87,400 ± 3,600 light-years ). It is a barred spiral galaxy with a supermassive black hole at its center and many satellite galaxies.
The galaxy rotation curve is a plot of the orbital speeds of stars or gas in a galaxy versus their radial distance from the center. The curve shows a discrepancy between the observed and theoretical velocities, which is explained by the existence of dark matter.
The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. It contains a supermassive black hole of about 4 million solar masses, called Sagittarius A*, which is a compact radio source near the galactic rotational center.
The motion of nearly 1.3 billion stars has been recorded as well as the location and brightness of 1.7 billion. ... visualizations of what the Milky Way looks like. The image you see above ( full ...
Hypervelocity stars are stars that escape from the Milky Way due to gravitational encounters with the supermassive black hole at the Galactic Center. Stellar kinematics is the observational study of the motions of stars and galaxies, and can identify these exotic phenomena.
A comprehensive overview of the Sun and the objects that orbit it, either directly or indirectly. Includes regions, celestial objects, physical characteristics, history, exploration, lists and more.
The Large Magellanic Cloud (LMC) is a dwarf galaxy and satellite galaxy of the Milky Way. [7] At a distance of around 50 kiloparsecs (163,000 light-years), [2] [8] [9] [10] the LMC is the second- or third-closest galaxy to the Milky Way, after the Sagittarius Dwarf Spheroidal (c. 16 kiloparsecs (52,000 light-years) away) and the possible dwarf irregular galaxy called the Canis Major Overdensity.
Learn about the structure, classification and history of spiral galaxies, a type of galaxy with a flat disk, a central bulge and spiral arms. Find out how the Milky Way, the largest spiral galaxy, compares to other examples and what makes it unique.
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