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The abundance of the chemical elements is a measure of the occurrence of the chemical elements relative to all other elements in a given environment. Abundance is measured in one of three ways: by mass fraction (in commercial contexts often called weight fraction ), by mole fraction (fraction of atoms by numerical count, or sometimes fraction ...
Whirlpool Galaxy. The Whirlpool Galaxy, also known as Messier 51a ( M51a) or NGC 5194, is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus. [6] [7] [8] It lies in the constellation Canes Venatici, and was the first galaxy to be classified as a spiral galaxy. [9]
Below is a list of the largest known nebulae so far discovered, ordered by actual diameter. This list is prone to change because of inconsistencies between studies, the great distances of nebulae from our stellar neighborhood, and the constant refinement of technology and engineering .
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters. The Phoenix Cluster ( SPT-CL J2344-4243) is a massive, Abell class type I galaxy cluster located at its namesake, southern constellation of Phoenix. It was initially detected in 2010 during a 2,500 square degree survey of the southern sky using the Sunyaev–Zeldovich ...
Under the Milky Way. For the Australian television comedy series, see Under the Milky Way (TV series). " Under the Milky Way " is a single by Australian alternative rock band the Church, released on 15 February 1988, [1] and appears on their fifth studio album Starfish. The song was written by bass guitarist and lead vocalist Steve Kilbey and ...
The Galactic Center, as seen by one of the 2MASS infrared telescopes, is located in the bright upper left portion of the image. Marked location of the Galactic Center. The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. [1] [2] Its central massive object is a supermassive black ...
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Yui Horie. Yui Horie (堀江 由衣, Horie Yui, born September 20, 1976) is a Japanese voice actress and singer affiliated with VIMS and Starchild. [2] [3] She has been affectionately nicknamed " Hocchan " (ほっちゃん) by her Japanese fans. She debuted as a voice actress in 1997, releasing her debut single " My best friend " on November 18 ...