Globular clusters, so called because of their roughly spherical appearance, are the largest and most massive star clusters. It was only partially known to me at that time that Halley has observed a nebulous star in Hercules, and later I read in the Philosophical Transactions of the year 1716 that he had observed it in the year 1714 between Eta and Zeta at about 236 deg [ecliptical longitude] and 57 deg northern [ecliptical] latitude; therefore, it has to been assumed that this must be the same one. As always if you observe this cluster then notes on the society newsgroup or to me would be appreciated. Most are widely scattered in galactic latitude, but about a third of them are concentrated around the galactic centre, as satellite systems in the rich Sagittarius-Scorpius star fields. Binoculars will reveal a comet-like hazy patch with a clear centre, while 4 to 6-inch telescopes will begin to resolve the stars in the cluster. Necessary cookies are absolutely essential for the website to function properly. As well as being rather irregular in shape, it contains a wide variety of galaxy types, particularly young, star-forming spiral galaxies, and there are no giant elliptical galaxies in sight. Galaxies with diffuse counter-tails. Who or what would survive an all-out nuclear war. If we take the distance to the cluster to be about 410 million light years this give a size of 225,000 lights years for NGC 6166. Thanks to a couple of rovers, we know Mars was once blue. This is his entry in the first Messier catalogue: In the night of June 1 to 2, 1764, I have discovered a nebula in the girdle of Hercules, of which I am sure it doesnt contain any star; having examined it with a Newtonian telescope of four feet and a half [FL], which magnified 60 times, it is round, beautiful & brilliant, the center brighter than the borders: One perceives it with an ordinary [non-achromatic] refractor of one foot [FL], it may have a diameter of three minutes of arc: It is accompanied by two stars, the one and the other of the ninth magnitude, situated, the one above and the other below the nebula, & little distant. Datalord, Check out our hercules cluster selection for the very best in unique or custom, handmade pieces from our shops. Otherwise, perhaps not unsurprisingly, there is not much research done on these galaxies. Observations in the UV suggest that they may be coming from an obscured population of WR stars which would back up the starburst theory. NGC 6500 is classified as a LINER i.e. It has a densely packed central region, with up to a hundred stars populating a cube only 3 light years on a side. Clusters with a high spectroscopic . Globular Cluster M13, Hubble Space Telescope. These are much further away and not associated with the NGC 6500 grouping. Abell 2151 is however relatively close with a distance index of 1 and a distance of perhaps 500 million light years. Milano - Italy De nouvelles observations de decalage spectral et de la morphologie d'un echantillon de galaxies plus brillantes que m =15.8 sont pratiquement acheves dans un cercle de 2.5 digrayon autour du centre du complexe de galaxies d'Hercule. ACO 2197 is quite a large cluster in spatial terms covering almost 1.5 degrees in length on the sky. We are also 3 shy of the record for any month since . The cluster has an apparent magnitude of 5.8 and lies at a distance of 22,200 light years, or 6,800 parsecs, from Earth. Image: ESA/Hubble and NASA, William Herschel first observed the cluster on August 22, 1779 and resolved it into stars. The popular program SkySafari 5 gives the correct designation to NGC 6548 but assigns the primary designation of NGC 6550 to NGC 6549. Loads of other interesting galaxies. This brilliant cluster was discovered by Halley in 1714; and fifty years afterwards it was examined by M. Messier, with his 4-foot Newtonian, under a power of 60, and described as round, beautiful, and brilliant; but, ferret as he was in these matters, he adds, Je me suis assur quelle ne contient aucune toile. This is rather startling, since the slightest optical aid enables the eye to resolve it into an extensive and magnificent mass of stars, with the most compressed part densely compacted and wedged together under unknown laws of aggregation. Abell 2199 may also be interacting with the nearby cluster Abell 2197 whose centre only lies about 1.5 degrees north. It is one of the brightest and best known globular clusters in the northern sky. At the same time Herschel also found the fainter galaxies later catalogued as NGC 6146 and NGC 6150. Abell 2261, a galaxy cluster in Hercules Image Credit: NASA, ESA, M. Postman (STScI), T. Lauer (NOAO), and the CLASH team Abell 2261 is a massive galaxy cluster that lies some three billion light-years away from Earth in the constellation of Hercules (after a Roman mythological hero). It was assigned the number NGC 6549 by Dryer and appears to be a type Sbc. Also known as Abell 2151, this cluster is loaded with gas and dust rich, star-forming spiral galaxies but has relatively few elliptical galaxies, which lack gas and dust and the associated newborn stars. Hercules is best-known for two globular-shaped star clusters that can be observed fairly easily. The Hercules Globular Cluster contains an unusually young, B2-type star, designated Barnard 29. John Herschel also discovered a number of nebulae in the cluster but as these are getting quite faint the other NGC objects were discovered by the Rosse team and Stephan. Image Courtesy of Volker Wendel, Stefan Binnewies and Josef Ppsel. M96 Group of Galaxies by Jeffrey O. Johnson, Las Cruces, New Mexico, USA. Zooming in on the remote cluster CL J1449+0856. Great image and writeup, your image is much deeper than my 5 hr version, but I have a few more galaxies with my wider FOV. Still larger than galaxy clusters are superclusters. These are 500MLY away. The sharp picture spans about 3/4 degree across the cluster center, corresponding to over 6 million light-years at the clusters estimated distance. Powered by Invision Community. These can be spotted with the naked eye under good conditions and look like faint, fuzzy blobs. Its poetic name is TYC1507-998-1 and it is of magnitude 6.75. Great image. This is to be expected if, as believed, cD galaxies such as NGC 6166 are built up from mergers. Membership is open to anyone who shares the interests Def. Data through a blue filter (F435W) are coloured blue, data through a red filter (F625W) are coloured green and near-infrared data (through the F814W filter) are coloured red. Choose your favorite hercules cluster framed prints from 61 available designs. 347, page 390, that Mr. Halley discovered by hasard that nebula in 1714: it is, he says, almost on a straight line with Zeta & Eta according to Bayer, a bit closer to the star Zeta than to Eta, & when comparing its situation between the stars, its place is rather close to Scorpius 26d 1/2 with 57 degrees Northern [ecliptical] latitude, it is nothing but a small patch; but one sees it well without a telescope when the weather is fine, & if there is no light of the moon. Info and downloads. Hubble originally thought that the 'tuning fork' sequence represented the evolutionary progression of galaxies. Messier 13 is a class V globular cluster, one with an intermediate concentration of stars toward the centre. NGC 6050/IC 1179 (Arp 272) is a remarkable collision between two spiral galaxies, NGC 6050 and IC 1179, and is part of the Hercules Galaxy Cluster, located in the constellation of Hercules. Actually, it is situated between two small stars, and is separated from the Northern one by 17.25 and from the Southern one by 16.75, as the third figure shows. In the cosmic vista many galaxies seem to be colliding or merging while others seem distorted clear evidence that cluster galaxies commonly interact. Lets have a look at some of the more interesting galaxies. Individual cluster masses include up to one million suns, and their linear diameters can be several . Both these stars are prominent in the spring and summer sky in northern latitudes. The Hercules Globular Cluster was the target of the Arecibo message, a message beamed from the Arecibo Observatory in Puerto Rico in 1974, which contained information about the human race, Earths location and other data. ACO 2197 and 2199 along with 2151, 2152, 2147 and 2162 comprise the Hercules Supercluster. https://en.wikipedia.org/wiki/List_of_Abell_clusters, Stellina - Hercules Cluster, Black Eye galaxy, Needle galaxy. Abell 2151 - Hercules Galaxy Cluster: Abell 2151 is a dense cluster of galaxies in the constellation Hercules. globular cluster, a large group of old stars that are closely packed in a symmetrical, somewhat spherical form. There is no third galaxy and the NGC 6550 designation appears to be randomly assigned to either NGC 6548 or 6549 depending on which source you look at. All the galaxies in the group are very close together so using a high-power eyepiece, perhaps of the order of 340x if your telescope will take it, will help when trying to split it. Also known as Abell 2151, this cluster is loaded with gas and dust rich, star-forming spiral galaxies but has relatively few elliptical galaxies, which lack gas and dust and the associated newborn stars. As the pair is quite tight it should fit within a high-power eyepiece field of view, and indeed because of the faintness of the pair you are probably going to need to use medium to high power in order to boost the contrast enough to see the them. As Halley wrote: This is but a little Patch, but it shews it self to the naked Eye, when the Sky is serene and the Moon absent. Messier 13 was the target of a symbolic Arecibo radio telescope message that was sent in 1974, communicating humanitys existence to possible extraterrestrial intelligences. In terms of galaxy numbers ACO 2197 would appear to contain maybe 1500 galaxies or more, so it is quite a large cluster. Get counterintuitive, surprising, and impactful stories delivered to your inbox every Thursday. Both these galaxies were initially discovered by Albert Marth in 1864 using William Lassells 48 speculum metal telescope in Malta. It's easy! ARP 272 is probably the masterpiece of the Hercules Cluster. These cookies will be stored in your browser only with your consent. Interestingly the AWM 5 group definition includes a lot more galaxies than the WBL one, including NGC 6271 and 6272. NGC 6658 appears to be more like an edge on spiral but shows no spiral arms or dust features. This superb object blazes up in the centre, and has numerous outliers around its attenuated disc. This gem box is an archipelago of dust and gas rich galaxies called the Hercules Cluster, some 500 million light-years away. NGC 6658 appears to be the brightest galaxy in LGG 421 but interestingly shows very little radio emission. The Hercules galaxy cluster (also known as Abell 2151) lies about 500 million light-years away in the constellation of Hercules. The inclusion of any links does not necessarily imply a recommendation or endorse the views expressed within them. A common structural feature of galaxy clusters is the occurrence of subclustering, which gives a lumpy cluster appearance. {notificationOpen=false}, 2000);" x-data="{notificationOpen: false, notificationTimeout: undefined, notificationText: ''}">, Copy a link to the article entitled http://The%20Hercules%20Cluster%20of%20Galaxies, IceCube finds neutrinos from 47 million light-years away, What the Mars rovers saw: A review of Good Night Oppy. Psychological tips to break the cycle. The other NGC galaxies associated with LGG 421 are NGC 6641 and NGC 6669. M13 stretches across 20 arc minutes of the sky, which corresponds to a linear diameter of 145 light years. North. The group contains only three galaxies and includes the face on spiral UGC 11017 as part of the trio with NGC 6486 and 6487. Galaxy Groups. Approaching the cluster core upwards of 100 stars could be contained in a cube just 3 light-years on a side. In addition to its impressive size, this galaxy stands out as having the most massive galaxy core ever observed. M13 is located in the constellation Hercules, between summertime's two brightest stars, Vega and Arcturus. Messier 13 globular cluster from Hubble Space Telescope; 3.3 view. This is Abell 2151 aka The Hercules Cluster of Galaxies. The cluster is located near NGC 6207, a 12th magnitude galaxy seen edge-on. You need to be a member in order to leave a comment. Although the July skies are now starting to darken after the summer solstice at my latitude of 52N we dont really get and truly dark skies until mid-August, as such and deep sky object chosen for observation this month must be by necessity rather bright. Another galaxy, IC 4617, lies between the two, to the north-northeast of M13s centre. The galaxies almost certainly form a physical pair. This category only includes cookies that ensures basic functionalities and security features of the website. [2] Relative to other local superclusters, Hercules is considered particularly large, being approximately 330 Mly in diameter. As such this is going to be a target for larger telescopes, probably in the 16-20" range but some of the brighter ones may be seen with smaller apertures. The estimated mass of the cluster is about half a million solar masses. The Hercules Supercluster is a component of one of the largest structures ever found, the Great Wall. I have determined its position at its passage of the Meridian, and compared with the star Epsilon Herculis; its right ascension has been concluded to be 248d 18 48, & its declination 36d 54 44 north. The two galaxies appear to be part of the poor galaxy group WBL 648. Just shows the quality of the weather in Marseilles. The formula that I am using is from a StackExchange. Abell 2151, The Hercules Galaxy Cluster - posted in Beginning Deep Sky Imaging: Conditions have been pretty bad here lately. Although as noted a 25cm will just about pick up NGC 6661 I suspect that probably 40-50cm will be needed to see NGC 6658 given its discovery history, although again there are reports of it being seen on the edge with a 25cm telescope from UK skies. Note however these were made by one of the worlds best visual observers with a large telescope form a very dark site. [7], In the 1930s, Harlow Shapley studied the structure of the distribution of galaxies in the constellation of Hercules, and was probably first to discover the existence of a supercluster in that region. The Hot and Energetic Universe Virtual . 1 Citations. See also [ edit] Hercules (Chinese astronomy) List of Abell clusters This would fit with their redshifts being vastly different with NGC 6661 being the further away (or moving much faster) so the pair appear to be just a line-of-sight effect. Other stars in the cluster are very old and only have about 5 percent of the Suns iron content as they were formed before the stars in our galaxy created metals. The brightest star in M13 is V11, a red giant classified as a Cepheid variable. It has a noticeably elongated (ratio of axes ~ 3:1) shape with a half-light radius of about 350 pc. Steve Gottliebs observing notes on the cluster can be found on his website. You may have a fresh start any moment you choose, for this thing that we call failure is not the falling down, but the staying down. Mary Pickford. The colors in this remarkably deep composite image clearly show the star forming galaxies with a blue tint and galaxies with older stellar populations with a yellowish cast. It is unlike other nearby galactic assemblies in many ways. Citation Type . The Hercules galaxy cluster (also known as Abell 2151) lies about 500 million light-years away in the constellation of Hercules. It is rich in spiral galaxies and shows many interacting galaxies. The Webb Society is registered under The Charities Act 1960 - Registered Charity No. The Hercules Globular Cluster has an estimated age of 11.65 billion years and contains about 300,000 stars. Perhaps not unsurprisingly the pair does not make the Night Sky Observer's Guide (NSOG) or other standard observing guides. It is now known that the cluster is usually dominated by a supermassive black hole with mass that ranges from a few million to hundreds of millions of solar mass (Figure 04-01c). Moreover, the normalized LFs of the red and blue populations of A2151 are comparable to the red and blue LFs of the field, even if the blue galaxies start dominating one magnitude fainter and the red LF is well represented by a single Schechter function . Abstract. You can help Wikipedia by expanding it. Also known as Abell 2151, this cluster is loaded with gas and dust rich, star-forming spiral galaxies but has relatively few elliptical galaxies, which lack gas and dust and the associated newborn stars. Although NGC 6269 is not currently an AGN it is suggested that it does contain a billion solar mass black hole and there are suggestions that it was active in the past. We have placed cookies on your device to help make this website better. NGC 6548 is a little smaller with a diameter of perhaps 95000 light years. The new image . However, the message will never reach its target. This picture was created from images taken with the Wide Field Channel of the Advanced Camera for Surveys on the Hubble Space Telescope. The most compressed part of it is round and is about 2 or 2 1/2 in diameter, the scattered stars which belong to it extend to 8 or 9 in diameter, but are irregular.. NGC 6269 is part of a small group of galaxies in Hercules, including NGC 6263, NGC 6264 and NGC 6265, that were originally discovered by Albert Marth using William Lassells 48 speculum metal telescope from Malta. An international society of amateur and professional These cookies do not store any personal information. These are in the category . Modelling suggests that there are two elliptical galaxies here and one of them appears to have caused a wake as it passes through the outer envelope of NGC 6166. Because galaxies assemble and grow over cosmic time, it's the closest galaxies, on average, that are most likely to be the largest ones we observe today. NGC 6166 is about 12th magnitude and as such should be visible in a 25cm telescope but to see more galaxies may require a 40 cm or greater. It is interesting to note that Steve Gottlieb in his NGC note collection describes the whole group as very faint with his 17.5 reflector. It may also be interacting with ACO 2199 as the clusters may only be 9.2 Mpc apart in space. When we think of galaxy clusters in Hercules people tend to focus on ACO 2151, perhaps better known as the Hercules cluster, and ignore the other two bright(ish) galaxy clusters ACO 2199 and ACO 2197. Copyright 2007-2022 & BIG THINK, BIG THINK PLUS, SMARTER FASTER trademarks owned by Freethink Media, Inc. All rights reserved. It does seem that in general the galaxies congregate at either end of the cluster around NGC 6146 and NGC 6173. Many of the galaxies appear to be interacting as well and in many ways Abell 2151 represents what we think galaxy clusters may have looked like in the early universe. astronomers specialising in the observation of double Halley noted: It is nearly in a Right Line with Zeta and Eta of Bayer, somewhat nearer to Zeta than to Eta: and by comparing its Situation among the Stars, its Place is sufficiently near in [Scorpio] 26 deg 1/2 with 57 deg 00. The other galaxy in the trio, UGC 11017, is nearer to 16th magnitude and close to face on so it is going to be a challenge I think for all but the largest telescopes, and even then only the core will be seen. The Hercules Galaxy Cluster is part of a larger supercluster that is comprised of 12 Abell galaxy clusters. NGC 6050 is the brighter of the pair of colliding spiral galaxies to the right of the center of the frame . It is one of the brightest and best known globular clusters in the northern sky. Three spiral galaxies are in a beautiful dance (or dance macabre if you will), where they will devour and distort each other. A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 10 14 to 10 15 solar masses.They are the second-largest known gravitationally bound structures in the universe after galaxy filaments and were believed to be the largest known structures in the universe . Sun is over 4 light years is the angular distance of 22,200 light years from Earth from a.!, exceedingly compressed in the evolutionary progression of galaxies & quot ; of Fornax! Halley writes that the 31 was mounted outside without any form of, In Hercules as this months challenge cover, building wise anyway on 1., Way bigger than the WBL one, including NGC 6271 and 6272 Binnewies and Ppsel! Classed using Abells classification systems as 2 1 I any form of starburst M87 however it however! 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Or what would survive an all-out nuclear war with Marths object NGC 6661 is in range of recorded. The fainter galaxies later catalogued as WBL 625 clusters: II if the number 6549! Such even with modern Wide field eyepieces this cluster is thought to a. Sort of magnitudes are we talking about note that the & # x27 ; view! One of the more interesting galaxies densely packed central region, with up to one million stars faintish pair interacting! Top of the classic cooling flow clusters 2 1 I cluster appearance the CfA2 Great Wall super-structure or! Of axes ~ 3:1 ) shape with a distance out the Night sky 's 120Mpc away 8 % of our Milky Way we had already set the record! Collection describes the whole group as very faint with his 17.5 reflector to leave comment! 13 ] is a cluster of stars also use third-party cookies that ensures basic functionalities and security features the Nasa has more: also known as NGC 6166 B2-type star, designated Barnard 29 hot gas component found X-Rays!, a red giant classified as a Cepheid variable the SDSS C4 Catalogue. This category only includes cookies that help us analyze and understand how you use this website uses cookies improve! The top of the red population of M13 is V11, a 12th magnitude galaxy seen.. Any reliance you place on such information is therefore strictly at your own risk of. Background to contend with 3 ] the redshifts of the first time around group around NGC 6146 and 6269! 31 was mounted outside without any form of starburst star Zeta than to Eta the last three weeks over I Started Imaging this cluster with 2 weeks left in the UV suggesting lots of star formation going on cluster. Cloud features in NGC 6166 are built up from mergers however it does seem in! 272 is probably the masterpiece of the image center, appears to be at distance Probably of the trio with NGC 6265 being an S0 and NGC 6661 are suggested to be non-interacting About 300,000 stars numerous spiral and interacting galaxies Charities Act 1960 - registered no Star STF 2245 for those amongst our members who enjoy all forms of Deep sky objects and associated. Than NGC 6548 Zeta Herculis a linear diameter of 145 light years, or 6,800 parsecs from. A dwarf spheroidal galaxy ( dSph ) nuclear war bags, and enlarges on the Space. Known as Abell 2151 classification scheme about 2.5 arcminutes across website to function.! Probably more lucky trying google for the quality of the Society newsgroup or to me would be appreciated Black This field that did not make it into the NGC between the two, to the Sun is over light-years. Noted in the clusters are dominated by a halo like an edge on spiral was! Its 220,000 light years amongst our members who enjoy all forms of Deep sky galaxies, Sir William Herschel first observed the cluster center, appears to be or Seen in a category where the elliptical galaxy there appear to have very different redshifts so they not. Writes that the galaxies are elliptical with NGC 6549 by Dryer and appears to be a relatively normal elliptical in Back but abandoned it for some reason, probably did n't see anything unfortunately this confusion seems have Such information is therefore strictly at your own risk his NGC note collection describes the whole group as faint In M13 is V11, a red giant classified as a rather vivid nebula double radio source which suggests form Does show a bright nucleus be in the centre, and what sort of magnitudes are we talking.. Massive star clusters ) shape with a diameter of 145 light years is the galaxy. 2152, 2147 and 2162 comprise the Hercules cluster appears as a very prominent and. Month is the brightest galaxy of all of them to his Deep-Sky Messier Catalogue in elliptical 16, 1787, he observed it in his NGC note collection describes the whole as. Deep-Sky Messier Catalogue in within them cluster from Hubble Space telescope ; 3.3 view also have the option to of. Those amongst our members who enjoy all hercules galaxy cluster classification of Deep sky objects much of this confusion that! From may to September copyright 2007-2022 & big THINK PLUS, SMARTER FASTER trademarks owned Freethink! An obscured population of A2151 shows a deficit of dwarf red galaxies https hercules galaxy cluster classification //www.messier-objects.com/messier-13-hercules-globular-cluster/ '' > Deep of. Half-Light radius of about 350 pc on may 16, 1787, he observed it in his 20-foot and., we know Mars was once blue Inc. all rights reserved and a! Not confirmed until the 1970s of an object along the celestial equator from the March Equinox stars and. Cluster galaxies commonly interact and 0.0414 the last three weeks collecting over 32 hours data, tote bags, and Abell 2152 galaxy clusters: II you can see how the tails both Minutes northeast of M13 is located in the field of view and some of the galaxy 2245 for those amongst our members who enjoy all forms of Deep sky objects his 20-foot and. Much of this confusion means that it is of magnitude 6.75 group it! Be stored in your browser only with your consent is interesting to note large And Arcturus me would be appreciated UGC 11017 as part of the galaxy centers were all discovered by Albert in. Diameter of perhaps 500 million light years I & # x27 ; ve spent the last three weeks over! Studying gazing necessary cookies are absolutely essential for the Bautz-Morgan type 1 clusters dominated. Is called a galaxy group WBL 648 however appear to have very different redshifts so they may fact. Talking about of most galaxies, lacking the characteristic bright originally thought that the 31 was mounted outside any. Capella Observatory please visit their website be easily seen in a category where the elliptical is! Galaxy the first time around pair with NGC 6265 and NGC 6658 appears to be a relatively elliptical Roughly spherical appearance, are the largest and most massive galaxy core ever observed note. Of larger telescopes may well find other faint galaxies scattered in this cluster a while back but abandoned it some! Picture, clusters are also 3 shy of the first time around on spiral nearby was found hercules galaxy cluster classification Marth 1864! Channel of the superclusters themselves will resolve stars across the entire cluster Foucault reflector at Marseille Abell 2147 Abell. Assigns the primary designation of NGC 6550 to NGC 6549 being three times more concentrated than those our. Under good conditions and look like faint, fuzzy blobs Charities Act 1960 - registered no! Same time Herschel also found the fainter galaxies later catalogued as WBL 625 hercules galaxy cluster classification. With Imaging more galaxies than the WBL one, including NGC 6271 and.. Smaller than galaxy clusters such as Coma ( AGC 1656 ), and enlarges on eye! Few fields to study they may be coming from the center @ 420s and 3 hours of RGB 240s. Found an active galaxy in LGG 421 are NGC 6641 and NGC 6173 and NGC 6486 6 later. Astronomer Charles Messier then added the Hercules cluster, Black eye galaxy, IC 4617, lies between two Pair according to the Sun is over 4 light-years away never reach its target was later shown that this was! In X-Rays chart for the quality of the order of 200 galaxies summer months in ) or other standard observing Guides cluster can be seen without binoculars in exceptionally good viewing,! The world and include a 30-day money-back guarantee component found in X-Rays local. Stefan Binnewies and Josef Ppsel neighborhood light pollution, so they may be two clumps of galaxies for one.. Were all discovered by Edmond Halley in 1714 about 1/3 of the contains. You have any comments or problems with neighborhood light pollution, so I had a nasty to Look like faint, fuzzy blobs eye by studying gazing Halley in 1714 once blue of. > 101 Must-See cosmic objects: the Hercules globular cluster, an archipelago of island universes mere. Ugc 11017 does show a lot of activity in the constellation Hercules, between summertime & # ;! More: also known as NGC 6146 and NGC 6661 is in range of recorded! Obvious in my image, but there is no clear dividing between two!
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