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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.
Learn about the different ways of specifying positions of celestial objects relative to various reference frames, such as equatorial, ecliptic, galactic, and horizontal. Compare the fundamental planes, poles, origins, and coordinates of each system and see how to convert between them.
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 ...
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.
English: Sun's Path Around the Milky Way. An illustration showing the path of the Sun, Earth and Moon around the Milky Way. The inclinations of the Ecliptic Plane and Celestial Equator are shown with respect to the Galactic North Pole and Galactic Plane. The inclination of the moon's orbit is shown relative to the Ecliptic Plane.
The Local Group is the galaxy group that includes the Milky Way, where Earth is located. It has a diameter of 10 million light-years and a mass of 2 × 10 12 solar masses, and consists of two collections of galaxies in a "dumbbell" shape.
A comprehensive overview of the Solar System, its regions, celestial objects, structure, composition, history, exploration and lists. Includes diagrams, timelines, maps and links to related articles.