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The Milky Way is the galaxy that includes the Solar System, with a hazy band of light seen in the night sky. It is a barred spiral galaxy with a supermassive black hole at its center, and contains 100–400 billion stars and planets.
Learn about the position and size of Earth in the Solar System and the Universe, based on telescopic observations and scientific measurements. Compare Earth with other celestial bodies and structures, such as the Sun, the Moon, the Kuiper belt, and the Oort cloud.
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.
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 ...
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.
Laniakea Supercluster is the galaxy supercluster that contains the Milky Way and about 100,000 other nearby galaxies. It was defined in 2014 by a new method based on galaxy velocities and has four subparts: Virgo, Hydra–Centaurus, Great Attractor, and Antlia Wall.
The Local Sheet in astronomy is a nearby extragalactic region of space where the Milky Way, the members of the Local Group and other galaxies share a similar peculiar velocity. [2] This region lies within a radius of about 7 Mpc (23 Mly), [3] 0.46 Mpc (1.5 Mly) thick, [1] and galaxies beyond that distance show markedly different velocities. [3]
In astronomy, the local standard of rest or LSR is a reference frame which follows the mean motion of material in the Milky Way in the neighborhood of the Sun (stars in radius 100 pc from the Sun), [1] on average sharing the same velocity around the Milky Way as the Sun. [2] The path of this material is not precisely circular. [3]
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