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The Pisces-Perseus Supercluster
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Product Description
Pisces-Perseus Supercluster
In 1977, there was a rare conference attended by both Western and Soviet astrophysicists, in Tallinn, Estonia, then part of the USSR. The two groups finally were able to discuss each other’s ideas properly, essential because merely reading (sometimes quite dense, and short on intuitive explanation) papers had held back full appreciation of the ideas. Some Soviet ideas about how patterns of galaxies form, by the great Yakov Zel’dovich and others, turned out to be more insightful and accurate than ideas on this topic in the West at the time. We (the designers of this model) were fortunate to go to another meeting in Tallinn in 2014, that commemorated this meeting and Zel’dovich. A crucial Soviet idea was that the galaxies in the universe were organized along the edges of vast cells (as in biology, or a soap foam) called voids; we now call this structure the cosmic web. Estonians Mikhel Jõeveer and Jaan Einasto identified the Pisces-Perseus Supercluster for the first time there, citing it as perhaps the first evidence for this cellular universe idea. In turn, the matter inside Pisces-Perseus itself is organized in a smaller-scale cellular pattern, as the model shows. A good reference is at http://www.atlasoftheuniverse.com/superc/perpsc.html
Pisces-Perseus spans a wide swath, ~50° on the sky, linking galaxy clusters behind the constellations Pisces (in the zodiac) and Perseus. Pisces-Perseus is a pattern of galaxies, just as a constellation is a pattern of stars within our own galaxy. Galaxies in it are all a similar distance from us. So, arguably such a supercluster is more absolutely defined than a constellation, which has some stars many times farther from us than others, and would look totally different from a different place in our galaxy. Pisces-Perseus is some 2 million times farther from Earth than the stars in these constellations are. Those stars are also about 2 million times farther from Earth than Saturn is, so roughly, these constellations are to Earth as Pisces-Perseus is to the constellations.
This model was designed to be as scientifically accurate to our real Universe as possible, by experts in the field, Prof Miguel Aragón (UNAM, Ensenada, Mexico), and also helping, Dr Mark Neyrinck (Ikerbasque Asst Research Prof, Bilbao, Spain.) To produce it, we used galaxy positions from the HyperLeda (http://leda.univ-lyon1.fr/) and 2M++ (https://arxiv.org/abs/1105.6107) catalogs, and estimated the density using a new, simple yet sophisticated technique of inferring the cosmic web of filaments from galaxy positions. And it makes a great Christmas ornament!
In 1977, there was a rare conference attended by both Western and Soviet astrophysicists, in Tallinn, Estonia, then part of the USSR. The two groups finally were able to discuss each other’s ideas properly, essential because merely reading (sometimes quite dense, and short on intuitive explanation) papers had held back full appreciation of the ideas. Some Soviet ideas about how patterns of galaxies form, by the great Yakov Zel’dovich and others, turned out to be more insightful and accurate than ideas on this topic in the West at the time. We (the designers of this model) were fortunate to go to another meeting in Tallinn in 2014, that commemorated this meeting and Zel’dovich. A crucial Soviet idea was that the galaxies in the universe were organized along the edges of vast cells (as in biology, or a soap foam) called voids; we now call this structure the cosmic web. Estonians Mikhel Jõeveer and Jaan Einasto identified the Pisces-Perseus Supercluster for the first time there, citing it as perhaps the first evidence for this cellular universe idea. In turn, the matter inside Pisces-Perseus itself is organized in a smaller-scale cellular pattern, as the model shows. A good reference is at http://www.atlasoftheuniverse.com/superc/perpsc.html
Pisces-Perseus spans a wide swath, ~50° on the sky, linking galaxy clusters behind the constellations Pisces (in the zodiac) and Perseus. Pisces-Perseus is a pattern of galaxies, just as a constellation is a pattern of stars within our own galaxy. Galaxies in it are all a similar distance from us. So, arguably such a supercluster is more absolutely defined than a constellation, which has some stars many times farther from us than others, and would look totally different from a different place in our galaxy. Pisces-Perseus is some 2 million times farther from Earth than the stars in these constellations are. Those stars are also about 2 million times farther from Earth than Saturn is, so roughly, these constellations are to Earth as Pisces-Perseus is to the constellations.
This model was designed to be as scientifically accurate to our real Universe as possible, by experts in the field, Prof Miguel Aragón (UNAM, Ensenada, Mexico), and also helping, Dr Mark Neyrinck (Ikerbasque Asst Research Prof, Bilbao, Spain.) To produce it, we used galaxy positions from the HyperLeda (http://leda.univ-lyon1.fr/) and 2M++ (https://arxiv.org/abs/1105.6107) catalogs, and estimated the density using a new, simple yet sophisticated technique of inferring the cosmic web of filaments from galaxy positions. And it makes a great Christmas ornament!
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