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The galactic plane is inclined by approximately 46° to the line of sight from the Earth. [6] The ring structure of the galaxy is a region of star formation. It is offset from the galactic center and displays non-circular motion. [15] There is a compact radio source positioned approximately 6.2 kly from the nucleus of NGC 4725. Since there is ...
The Zone of Avoidance (ZOA, ZoA), or Zone of Galactic Obscuration (ZGO), [1] [2] is the area of the sky that is obscured by the Milky Way. [ 3 ] The Zone of Avoidance was originally called the Zone of Few Nebulae in an 1878 paper by English astronomer Richard Proctor that referred to the distribution of " nebulae " in John Herschel 's General ...
Messier 18 is 1,296 kpc [2] from the Earth and 6,830 kpc from the Galactic Center. [5] It is orbiting the Milky Way core with a period of 186.5 million years and an eccentricity of 0.02. This carries it to as close as 6.5 kpc to, and as far as 6.8 kpc from the galactic core.
The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies. The directions perpendicular to the galactic plane point to the galactic poles. In actual usage, the terms galactic plane and galactic poles usually refer specifically to the plane and poles of the Milky Way, in which Planet Earth is located.
The galactic coordinate system is a celestial coordinate system in spherical coordinates, with the Sun as its center, the primary direction aligned with the approximate center of the Milky Way Galaxy, and the fundamental plane parallel to an approximation of the galactic plane but offset to its north.
Its distance from Earth is about 25.2 million light-years or 7.72 megaparsecs, [2] similar to the distance of M101 (NGC 5457) in the constellation Ursa Major. [5] Both were once considered to be part of the Local Group, [6] but are now known to be among the dozen bright spiral galaxies near the Milky Way but beyond the confines of the Local ...
The Serpens–Aquila Rift is at 40° galactic longitude, from the center moving outwards to top-right. The Milky Way as seen by Gaia, with prominent dark features labeled in white, as well as prominent star clouds labeled in black. Main dark nebulae of the Solar apex half of the galactic plane, with the Aquila Rift on the right
The Gould Belt is a local ring of stars in the Milky Way, tilted away from the galactic plane by about 16–20 degrees, first reported by John Herschel and Benjamin Gould in the 19th century. [1] It contains many O- and B-type stars , and many of the nearest star-forming regions of the local Orion Arm , to which the Sun belongs.