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Size (left) and distance (right) of a few well-known galaxies put to scale. The following is a list of notable galaxies.. There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.
The Whirlpool galaxy and Abell 2744, a galaxy cluster Superclusters , galactic filaments and voids Notable astronomical objects and their known physical features.
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. [1] [2] The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.
Most distant (difficult) naked eye object. Closest unbarred spiral galaxy to us and third largest galaxy in the Local Group. 61,100 ly 96 Andromeda XXI [66] dSph [53] 2.802 0.859 −9.9 Local Group: Satellite of Andromeda 97 Tucana Dwarf: dE5 2.87 0.88 [7] −9.16 15.7 [1] Local Group [7] Isolated group member — a 'primordial' galaxy [67] 98 ...
It is the largest known spiral galaxy with the isophotal diameter of over 717,000 light-years (220 kiloparsecs). [ 1 ] This is a list of largest galaxies known, sorted by order of increasing major axis diameters.
The brightest cluster galaxy of the Bootes Cluster (ACO 1930), an elliptical galaxy at B1950.0 14 h 30 m 6 s +31° 46′ apparent magnitude 17.8, was found by Milton L. Humason in 1936 to have a 40,000 km/s recessional redshift velocity.
An example of a spiral galaxy, Messier 77 (also known as NGC 1068) Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae [1] and, as such, form part of the Hubble sequence.
The spiral galaxy NGC 4622 lies approximately 111 million light-years away from Earth in the constellation Centaurus. NGC 4622 is an example of a galaxy with leading spiral arms. [2] Each spiral arm winds away from the center of the galaxy and ends at an outermost tip that "points" in a certain direction (away from the arm).