Abell 2218

Galaxy cluster	List of galaxy clusters
Abell 2218 Galaxy groups and clusters are the largest gravitationally-bound objects. ... This page lists some of the more interesting galaxy clusters. ... Download high resolution version (610x655, 63 KB) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...
Observation data
Type:	Galaxy cluster
Galactic coordinate:	l = ?° b = ?°
Supergalactic coordinate:	L = ?° B = ?°
Distance:	3 billion ly
Constellation(s):	Draco
Members:	~250
Main member:
Other designations
none

Abell 2218 is a cluster of galaxies about 3 billion light-years away in the constellation Draco. Acting as a powerful lens, magnifying all galaxies lying behind the cluster core. The lensed galaxies are all stretched along the cluster's center and some of them are multiply imaged. Those multiple images usually appear as a pair of images with a third — generally fainter — counter image, as is the case for the very distant object. Galaxy groups and clusters are super-structures in the spread of galaxies of the cosmos. ... Many galaxies, including the Milky Way in which our Sun and Earth are located, are disk-shaped: the majority of their visible mass (excluding possible dark matter) lies very close to a plane. ... Supergalactic coordinates are coordinates in a spherical coordinate system which was designed to have its equator aligned with the supergalactic plane, a major structure in the local universe formed by the preferential distribution of nearby galaxy clusters (such as the Virgo cluster, the Great Attractor and the Pisces-Perseus supercluster... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Draco (Latin for Dragon) is a far northern constellation that is circumpolar for many northern hemisphere observers. ... Galaxy groups and clusters are super-structures in the spread of galaxies of the cosmos. ... (Redirected from 1 E22 m) Categories: Orders of magnitude (length) ... A light-year, symbol ly, is the distance light travels in one year: exactly 9. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Draco (Latin for Dragon) is a far northern constellation that is circumpolar for many northern hemisphere observers. ... A lens. ...

Abell 2218 was used as a gravitational lens to discover the most distant known object in the universe as of 2004. It(the object) is seen as it would have been 750 million years after the Big Bang. According to the Big Bang theory, the universe emerged from an extremely dense and hot state (bottom). ...

The color of the lensed galaxies is a function of their distances and types. The orange arc is an elliptical galaxy at moderate redshift (z=0.7). The blue arcs are star-forming galaxies at intermediate redshift (z=1-2.5). The encircled very red pair is the newly discovered star-forming galaxy at about redshift 7. Color is an important part of the visual arts. ... The colour orange occurs between red and yellow in the visible spectrum at a wavelength of about 585–620 nanometres. ... An elliptical galaxy is a type of galaxy in the Hubble sequence characterized by the following physical properties: The giant elliptical galaxy NGC 4881 (the spherical glow at upper left) lies at the edge of the Coma Cluster of Galaxies. ... Blue is any of a number of similar colors. ...

The lensed galaxies are particularly numerous, as we are looking in between two mass clumps, in a saddle region where the magnification is quite large.