|Updated June 01, 2013
The Milky Way and the Big Nebula of Andromeda have satellite galaxies. These two huge spirals belong to an even bigger grouping of 20 galaxies among which M31, M33, Maffei I and Maffei II, the Big and the Small Cloud of Magellan, conscript Groups it local. All these galaxies move around a common center situated between our Galaxy and the Nebula of Andromeda. All the observers know the biggest and the most brilliant of all: M31, in the constellation of Andromeda. The most known heap of galaxies are Virgo, Pegasus I, Pisces, Cancer, Perseus, Coma, Ursa Major III, Hercules, Pegasus, Heap A, Centaurus, Ursa Major I, Leo, Gemini, Corona Borealis, Heap B, Bootes, Ursa Major II, Hydra II Distant from 2,5 million light years, it is the closest galaxy but especially it is the only one who is visible in the bare eye, on dark night. We can consider the Local Group, or the other groups looking like it as heap containing a number relatively restricted by objects. Galaxy groups can be more important. If we come down until the magnitude 21, there would so be 75 million galaxies among which our.
The local group is a part of an enormous complex of 10000 galaxies assembled in heap extending over some 200 million years lights, conscript local super clusters or super clusters of the Virgo. The super clusters of the Virgo and super clusters of the Hydra and the centaur fall themselves towards another big conglomeration of galaxy groups which we call the Big Attractor. Galaxy comes from Greek " galactos " which wants to say milk. Of our ground base, we participate in a fantastic cosmic ballet: the Earth propels us in 30 km/s around the Sun which splits the space in 230 km/s around the Milky Way.
Image: few galaxies in our Local Group of galaxies. Author Richard Powell.
Galaxies group Virgo
The heap of the Virgo (Virgo) is a massive group of galaxies which dominates the super clusters of the Virgo. It is the closest heap of galaxies of our Galaxy, the Milky Way. There are approximately 2000 galaxies in this heap (but 90 % of them are dwarfish galaxies).
Image: The group of galaxies Virgo, dominated by M86 (at the top), M84 (to the right), NGC 4388 below and NGC 4387 in the middle.
Galaxies group Coma
The heap of Coma is a galaxies group, spherical, very dense in its center.
Image: Galaxies group Coma
The super clusters of Coma (Bernice's Hair) is one of galaxies group the most known.
Galaxies group Fornax
The group of galaxies Fornax is in about 65 million light years of the Earth. The galaxies of the heart of the heap Fornax seem to move in the direction of a common point, attracted by the dominant gravity of invisible structures of dark matter of this region.
Image: The group of galaxies Fornax of the look-out observatory Chandra reveals emissions with high energy of several huge galaxies close to the center of the heap Fornax and an immense diffuse cloud of warm gas emitting X-rays.
Galaxies group Shapley
On the photo above, the blue objects are galaxies and the yellow objects are stars in the foreground.
Image: clusters Shapley A3558
Cluster of galaxies Abell 2744
The Hubble Space Telescope still amazes us with this cluster of galaxies Abell 2744 is the most massive and deepest ever photographed all clusters of galaxies. This photograph shows some of the youngest galaxies ever detected in the deep cosmos. The immense gravity of the cluster Abell 2744 distorts space so that the image we see is distorted by the curvature, as through a lens we see the magnified galaxies that are much farther behind Abell 2744.
Long exposure Hubble images will be combined with Spitzer and Chandra X-ray Observatory NASA to provide new insights into the origin and evolution of galaxies and their black holes companions.
Image: This long exposure of the galaxy cluster Abell 2744 is performed by the Hubble Space Telescope. The image of the cluster massive galaxies (foreground) is the deepest ever made. The farthest galaxies around 12 billion years, they were born shortly after the Big Bang.