M81 group of galaxies
{{Galaxy cluster
name = M81 group
image =
type = Loose galaxy group
distance = ~12 million
constellation = Ursa Major/Camelopardalis
member_no = ~30
main_member = Bode's Galaxy
names = Bode's group, NGC 3031 group ...
M81 Near-IR image from 2MASS
M81 in the Near-Infrared
Moving to longer wavelengths, the spiral arms and star-forming regions in M81 are less prominent than in visible light. The image in this composite based on data from 1.2-2.
M82 is another member of the M81 group of galaxies found in the region of Ursa Major. This object is officially classified as an irregular galaxy. Its shape contains no discernable structure.
M81 = NGC3031 ( 9h 55.6m +69°04´, 6.8 mag. )
This large bright spiral galaxy in Ursa Major was discovered by Bode in Dec. 1774. Messier observed it on Feb. 9, 1781.
M81
A giant spiral galaxy 11 million light-years away in the constellation Ursa Major. It rules the M81 group, the second nearest galaxy group to the Local Group.
M87 ...
M81 Bode's Galaxy or Bode's Nebula
Description: spiral galaxy
Constellation: Ursa Major
Small Image
Large Image ...
To find M81, first you need to find the north star. Now, imagine a line running from the north star, directly down to the northern horizon.
M81 (NGC 3031, spiral galaxy)
M82 (NGC 3034, companion to M81)
M87 (NGC 4486, elliptical galaxy)
M97 (NGC 3587, Owl Nebula)
M101 (NGC 5457, spiral galaxy)
M104 (NGC 4594, Sombrero Galaxy)
M110 (NGC 205, companion to M31)
Mach's principle ...
Finally, to locate M81 and M82, look for the Big Dipper, and locate the 4 stars which make up the bowl of the Dipper.
Messier 82 (a starburst in the M81 group)
Though typical galaxy collisions take place over what to us seems a long timescale, they are short compared to the lifetimes of galaxies. Some collisions are gentler and longer-lasting.
An ultraviolet view of the spiral galaxy M81 shows young, hot stars in blue and older, cooler stars in yellow. The colors show that most of the galaxy's action takes place in its spiral arms, which wrap around a dense core.
Ursa Major has five Messier objects: M40, M81, M82, M97, and M101. M40 is the Messier object that really isn't one. In 1764 Messier went looking for an object that had been catalogued as a nebulosity in this area.
In the giant spiral M81, for instance they found 32 Cepheids to add to only two that had been found previously using ground-based telescopes. Using the HST they made 22 twenty-minute exposures of each of two fields in M 81containing the Cepheids.
Sobre la cabeza del oso hay dos galaxias, M81 y M82. Ambas se encuentran a una distancia de 12 millones de años, pero M81 es una de las galaxias más brillantes del cielo. Finalmente, la nebulosa del buho está situada a la izquierda inferior de Dubhe.
The left-hand panel shows the optical view of M81 (the large dominant galaxy) with neighbouring galaxies NGC 3034 (above) and NGC 3077 (lower left).
Y DNA haplogroup E1b1b (formerly E3b) predominates among North African populations; its E1b1b1b subgroup (M81) is identified especially with Berbers.
M40 Winecke 4 (double star)
M81 Bode's Galaxy or Bode's Nebula (spiral galaxy)
M82 The Cigar Galaxy (irregular galaxy)
M97 The Owl Nebula (planetary nebula)
M101 The Pinwheel Galaxy (spiral galaxy)
M108 (spiral galaxy)
M109 (spiral galaxy) ...
when they seemed to be farthest away from each other they can be viewed with smaller scopes (as it was the case 1975), but at their closest (in 1992) one needs at least an aperture of 15 cm to resolve the components.
Even with smaller scopes M81 is ...
The Big Dipper that we know and love is the bottom left part of Ursa Major. The splotches labeled M81, M82, and M101 are galaxies; M97 is a nebula. You'd need a telescope to see these objects. Photo and diagram courtesy of O.
The agency also creates symbols for major events, like the NASA 50th anniversary in 2008. The design of the logo uses the zero in 50 to evoke an eclipse and includes a Hubble Space Telescope image of M81, ...
The prototype example of such a starburst-forming interaction is M82, which experienced a close encounter with the larger M81. Irregular galaxies often exhibit spaced knots of starburst activity.
Active nucleus ...
Star-forming galaxy M82 is 12 million light years away. The inset shows a three-colour composite of the two galaxies made with the SPIRE camera, showing material being stripped from M81 by the gravitational interaction with M82.
The star at the bottom of the Big Dipper's bowl closest to the handle. A line from Phecda to Dubhe and an equal distance past it points to the location of the galaxies M81 and M82.
89
Sabik ...
the Local Group; M81) contains on the order of 10 galaxies separated by 10-100 galaxy diameters. A rich cluster (e.g., Virgo; Coma) contains 100 or more galaxies within a volume comparable to that of a loose group. Scale of cluster, about 1 Mpc.
html. One of the images appears to the left. It shows the dusty, winding arms of a spiral galaxy much like our own; it is M81, and shows the SST's ability to show infrared light in unprecedented detail.
Messier 81 is the largest of the 34 galaxies in the M81 Group, one of the nearest groups of galaxies to the Local Group, approximately 11.7 million light-years away. Bode's Galaxy can be found 10 degrees northwest of [8316] alpha Ursae Majoris.
The brightest since then was supernova 1987A in the Large Magellanic Cloud, a small satellite galaxy to the Milky Way. The brightest supernova in the northern sky for 20 years is supernova 1993J in the galaxy M81 which was first seen on 26 March ...
 See also: Galaxies, Galaxy, Earth, Star, Light
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