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Sagittarius contains two well-known star clouds, both considered fine binocular objects. The Large Sagittarius Star Cloud is the brightest visible region of the Milky Way. It is a portion of the central bulge of the galaxy seen around the thick dust of the Great Rift , and is the innermost galactic structure that can be observed in visible ...
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 supermassive black hole Sagittarius A*, imaged by the Event Horizon Telescope. [32] The complex astronomical radio source Sagittarius A appears to be located almost exactly at the Galactic Center and contains an intense compact radio source, Sagittarius A*, which coincides with a supermassive black hole at the center of the Milky Way.
The orbits of Solar System planets are nearly circular. Compared to many other systems, they have smaller orbital eccentricity. [70] Although there are attempts to explain it partly with a bias in the radial-velocity detection method and partly with long interactions of a quite high number of planets, the exact causes remain undetermined. [70] [74]
The radio source consists of three components: the supernova remnant Sagittarius A East, the spiral structure Sagittarius A West, and a very bright compact radio source at the center of the spiral, Sagittarius A* (read "A-star"). These three overlap: Sagittarius A East is the largest, West appears off-center within East, and A* is at the center ...
The three components are designated Zeta Sagittarii Aa (officially named Ascella / ə ˈ s ɛ l ə /, the traditional name for the entire system), [9] [10] Ab and B. [6] The Washington Double Star Catalog cites a component separated 72.3" from the system, but it is a background star unrelated to the pair.
Beta 2 Sagittarii (β 2 Sagittarii, abbreviated Beta 2 Sgr, β 2 Sgr) is a star in the zodiac constellation of Sagittarius. It is visible to the naked eye, having an apparent visual magnitude of +4.29. [2] Based upon an annual parallax shift of 24.31 mas as seen from Earth, [1] it is located 134 light-years from the Sun.
Chi 1 Sagittarii (χ 1 Sagittarii) is a binary star [6] system in the zodiac constellation of Sagittarius. The pair have a combined apparent visual magnitude of +5.03, [2] which is bright enough to be seen with the naked eye. Based upon an annual parallax shift of 12.95 mas as seen from Earth, [1] it is located around 252 light years from the Sun.