NGC 520 - a spiral galaxy in the constellation of Pisces NGC 520 was discovered September 13, 1784 by the English astronomer William Herschel. It is a size 11 type Sa spiral galaxy in the constellation Pisces pec. Angular dimensions of NGC 520 are 3.4 to 1.7 arcmin. This is a pair of colliding galaxies. The catalog Dreyer described as an object of weak, considerably large, extended to 137 °. Taking into account the available astronomical data concerning the transfer of NGC 520 the red, estimated the average distance of the galaxy from the Solar System, it amounts to about 90 million light-years, ie 27.80 Mpc. NGC 520 has a about 100 thousand light years in diameter. NGC 520 observed with the 45-cm reflector appears to us as an object rather bright, moderately large, elongated in the ratio of 5: 2-axis NW-SE, with a very unusual appearance. North-western region of the object is clearly brighter, you can see the regions of mottled structure. Disappears in approximately east-west, where it enters the region of irregular surface brightness with poorly defined edges. You could say that if there is a galactic police it would be difficult to determine which of these two galaxies caused the collision, which occurred about 300 million years ago. They lie at a distance of about 90 million light-years, which makes watching the events that took place a long time ago and we can see the current state of affairs. Taking into account all the data can be assumed that as a result of the collision, the two galaxies began to pull interstellar matter and develop it as tails. Maybe it was the interstellar dust has been destroyed or even some stellar formation, which provided the material for forming the tails. What we see in the foreground is a large amount of dust that glows in the deeper parts of it red. Another very similar example of colliding galaxies is NGC 4038. Alternative Designations: NGC 520, PMN J0124 + 0348, UGC 966, 87GB 012159.6 + 033202, H III-253, h 116, GC 303, Arp 157, 87GB [BWE91] 0121 + 0332, VV 231, [WB92] 0121 + 0332, CGCG 411-050, NVSS J012434 + 034729, CGCG 0122.1 + 0333, TXS 0121 + 035, MCG + 01-04-052, CXO J012435.1 + 034731, PRC D-44, 1WGA J0124.5 + 0347, 2MASX J01243507 + 0347326, 2XMM J012435.0 + 034729, IRAS 01219 + 0331, 2XMMp J012435.0 + 034729, IRAS F01219 + 0331, LGG 020: [G93] 003, AKARI J0124346 + 034 731, [HDL96] 385-014, ISOSS 9 [M98j] 018 NED09, ISOSS J01245 + 0347, [SLK2004] 0195, KPG 31, NGC 0520: [R2005] 11, NED 0085 LDCE 10 [RHM2006] SFGs 138, HDCE 0067 NED003, [BWC2008] U01, HIPASS J0124 + 03, PGC 5193, UZC J012434.3 + 034743
Posted on: Mon, 18 Aug 2014 20:14:12 +0000
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