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A star is a massive luminous spheroid astronomical object made of plasma that is held together by its own gravity.Stars exhibit great diversity in their properties (such as mass, volume, velocity, stage in stellar evolution, and distance from Earth) and some of the outliers are so disproportionate in comparison with the general population that they are considered extreme.
In this map of the Observable Universe, objects appear enlarged to show their shape. From left to right celestial bodies are arranged according to their proximity to the Earth. This horizontal (distance to Earth) scale is logarithmic.
In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN) [2] to catalog and standardize proper names for stars. The WGSN's first bulletin, dated July 2016, [3] included a table of 125 stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive Committee ...
Size (left) and distance (right) of a few well-known galaxies put to scale. There are an estimated 100 billion galaxies in all of the observable universe. [1] On the order of 100,000 galaxies make up the Local Supercluster, and about 51 galaxies are in the Local Group (see list of nearest galaxies for a complete list).
These Are The Weirdest. Jennifer Leman. April 7, 2020 at 10:50 AM. ... Ganymede, and Callisto in the 17th century restructured our understanding of the universe. Over the years, we’ve ...
The name Transvaalia was kept, and the name and number 933 Susi was reused for the object 1927 CH discovered February 10, 1927, by Karl Reinmuth. 864 Aase and 1078 Mentha The object A917 CB discovered February 13, 1917, by Max Wolf was named 864 Aase , and the object 1926 XB discovered December 7, 1926, by Karl Reinmuth was named 1078 Mentha .
Voids are particularly galaxy-poor regions of space between filaments, making up the large-scale structure of the universe. Some voids are known as supervoids . In the tables, z is the cosmological redshift , c the speed of light , and h the dimensionless Hubble parameter , which has a value of approximately 0.7 (the Hubble constant H 0 = h × ...
A peculiar galaxy is a galaxy of unusual size, shape, or composition. [1] Between five and ten percent of known galaxies are categorized as peculiar. [2] Astronomers have identified two types of peculiar galaxies: interacting galaxies and active galactic nuclei. [3]