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Its distance from Earth is about 25.2 million light-years or 7.72 megaparsecs, [2] similar to the distance of M101 (NGC 5457) in the constellation Ursa Major. [5] Both were once considered to be part of the Local Group , [ 6 ] but are now known to be among the dozen bright spiral galaxies near the Milky Way but beyond the confines of the Local ...
NGC 6939 is an old open cluster, located 400 parsec above the galactic plane and 8.400 parsec away from the galactic centre. [5] With the use of photometric studies, the age of the cluster was estimated to be between 1,0 and 1,3 billion years!, using as sample 638 stars within the field.
The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies. The directions perpendicular to the galactic plane point to the galactic poles. In actual usage, the terms galactic plane and galactic poles usually refer specifically to the plane and poles of the Milky Way, in which Planet Earth is located.
WR 93b was discovered in 2003 during a study of emission line stars from the AAO/UKST Southern Galactic Plane Hα Survey. It was published as the fourth galactic WO class star in 1994. [ 7 ] This was too late to be included in the VIIth Wolf Rayet catalogue, [ 8 ] but it is listed in an annex published in 2006.
Based on the tip of the red-giant branch distance indicator, it is located at a distance of about 40 million light-years (12.5 megaparsecs). [2] NGC 5643 has an active galactic nucleus and is a type II Seyfert galaxy.
The galactic coordinate system is a celestial coordinate system in spherical coordinates, with the Sun as its center, the primary direction aligned with the approximate center of the Milky Way Galaxy, and the fundamental plane parallel to an approximation of the galactic plane but offset to its north.
The inclination is at (an angle of) 23° ± 6° from the galactic plane, thus it reaches as much as 1.5 ± 0.4 kpc above the disk. [11] When passing through the disk, this cluster does so at less than 5 kpc from the galactic nucleus. The cluster undergoes tidal shock during each passage, which can cause the repeated shedding of stars. Thus the ...
It is located 4 degrees below the Galactic plane, and, at a distance of 4.0 Mpc (13 Mly), is one of the closest major galaxies to the Milky Way. [3] The galaxy is undergoing tumultuous changes, as rings of gas are likely being ejected from the galaxy. [4] Its outermost ring is 1400 light-years across while the inner ring is 260 light-years across.