Search results
Results From The WOW.Com Content Network
There are a few exceptions such as the Andromeda Galaxy, the Whirlpool Galaxy, and others, but most simply have a catalog number. In the 19th century, the exact nature of galaxies was not yet understood, and the early catalogs simply grouped together open clusters , globular clusters , nebulas , and galaxies: the Messier catalog has 110 in total.
Name based on the brightest galaxy in the group when that name is commonly used for identification (e.g. the M81 Group); this is only applicable to groups of galaxies within approximately 50 Mpc; The most commonly-used catalog number (e.g. Abell 3266) Note that group and cluster names are proper nouns.
BCG – (celestial object) Blue compact galaxy, another name for a blue compact dwarf, also bright central galaxy; BCG – (celestial object) Brightest Cluster Galaxy, the brightest galaxy in a cluster of galaxies; BCVS – (catalog) Bibliographic Catalogue of Variable Stars; BD – (catalog) Bonner Durchmusterung; BD – (celestial object ...
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 ...
One possible reason for this observation is what Webb Space Telescope calls "inside-out growth": When a galaxy evolves and expands outward from its nucleus at lower redshifts, a decreasing amount of gas is deposited near the accreting black hole. Thus, the black hole sheds its outer gas layers, becomes bluer, and is no longer categorized as an LRD.
Luminous blue variable stars can undergo "giant outbursts" with dramatically increased mass loss and luminosity. η Carinae is the prototypical example, [20] with P Cygni showing one or more similar outbursts 300–400 years ago, [21] but dozens have now been catalogued in external galaxies.
Brightest distant galaxy (z > 6, 12.9 billion light-years) Galaxy Cosmos Redshift 7 is reported to be the brightest of distant galaxies (z > 6) and to contain some of the earliest first stars (first generation; Population III) that produced the chemical elements needed for the later formation of planets and life as we know it. [5] [140]
With very low light capability, a few specific models of webcams are popular for solar, lunar, and planetary imaging. Mostly, these are manually focused cameras containing a CCD sensor instead of the more common CMOS. The lenses of these cameras are removed and then these are attached to telescopes to record images, videos, or both.