[permalink] [id link]
Shapley believed that spiral galaxies weren't systems equal to the Milky Way and in one of his arguments he used the results of Van Maanen, who measured the rotation of the spiral arms of spiral galaxies.
from
Wikipedia
Some Related Sentences
Shapley and spiral
In 1920 the so-called Great Debate took place between Harlow Shapley and Heber Curtis, concerning the nature of the Milky Way, spiral nebulae, and the dimensions of the Universe.
* 1920 — Harlow Shapley and Heber Curtis debate whether or not the spiral nebulae lie within the Milky Way,
In astronomy, the Great Debate, also called the Shapley – Curtis Debate, was an influential debate between the astronomers Harlow Shapley and Heber Curtis which concerned the nature of spiral nebulae and the size of the universe.
In this paper, Hubble concluded the " Great Debate " of 1920 between Heber Curtis and Shapley over the scale of the universe and the nature of the " spiral nebula ".
Shapley and galaxies
The survey also confirmed earlier theories that the Milky Way galaxy was in fact being pulled towards a much more massive cluster of galaxies near the Shapley Supercluster which lies beyond the Great Attractor.
The idea that they might instead be other galaxies, independent of the Milky Way, was the subject of the Great Debate of 1920, between Heber Curtis of Lick Observatory and Harlow Shapley of Mt.
In the same year he participated in the Great Debate with Harlow Shapley on the nature of nebulae and galaxies, and the size of the universe.
Shapley and systems
Gale's paper with Lloyd Shapley on the stable marriage problem provides the first formal statement and proof of a problem that has far-reaching implications in many matching markets and is currently being applied in New York and Boston public school systems in assigning students to schools.
Shapley and equal
In 1962, David Gale and Lloyd Shapley proved that, for any equal number of men and women, it is always possible to solve the SMP and make all marriages stable.
Shapley and Milky
In 1917, the astronomer Harlow Shapley was able to estimate the Sun's distance from the galactic centre based on the distribution of globular clusters ; previously the Sun's location within the Milky Way was by no means well established.
In 1915, Harlow Shapley used Cepheids to place initial constraints on the size and shape of the Milky Way, and of the placement of our Sun within it.
Many of the world's leading astronomers have appeared on the show through the years, including Harlow Shapley ( the first to measure the size of the Milky Way galaxy ), Fred Hoyle, Carl Sagan, Jocelyn Bell Burnell, Samuel Tolansky, Harold Spencer Jones, Martin Ryle, Carlos Frenk, and Bart Bok.
NGC 6709 appears in a rich Milky Way star field and is classified as a Shapley class d and Trumpler class III 2 m cluster.
Shapley was arguing in favor of the Milky Way as the entirety of the universe.
On other points the results were mixed ( the actual size of the Milky Way is in between the sizes proposed by Shapley and Curtis ), or in favor of Shapley ( Curtis ' galaxy was centered on the Sun, while Shapley correctly placed the Sun in the outer regions on the galaxy ).
Shapley and one
The Shapley value provides one possible answer to this question.
The Shapley value is one way to distribute the total gains to the players, assuming that they all collaborate.
It was one of the first globular clusters to be carefully studied first by Harlow Shapley in 1930.
Lloyd Shapley was born on June 2, 1923, in Cambridge, Massachusetts, one of the sons of the distinguished astronomer Harlow Shapley.
Shapley and arguments
Also, it is now known that the nova Shapley referred to in his arguments was in fact a supernova, which do indeed temporarily outshine the combined output of an entire galaxy.
Shapley and used
In his paper, Starr proved that a " convexified " economy has general equilibria that are closely approximated by " quasi – equilbria " of the original economy ; Starr's proof used the Shapley – Folkman theorem.
In game theory, the Shapley value or Shapley index is used to indicate the weight of a game.
Shapley and results
Curtis agreed that if the results of van Maanen were correct, Shapley was right.
In his 80s, Shapley continues publishing his old results, such as multi-person utility and authority distribution ( a generalization to the Shapley – Shubik power index and useful in ranking, planning and group decision-making ).
Shapley and who
In game theory, the Shapley value, named in honour of Lloyd Shapley, who introduced it in 1953, is a solution concept in cooperative game theory.
This came to the attention of Shapley, who opposed the publication of the work, having been made familiar with Velikovsky's claims through the pamphlet Velikovsky had given him.
After meeting Harlow Shapley, the Director of the Harvard College Observatory, who had just begun a graduate program in astronomy, Cecilia Payne left England for the United States in 1923.
When Scarf was at Princeton, he did not study game theory or economics but knew Martin Shubik, Lloyd Shapley, and John Nash who were actively involved in the early development of game theory.
Shapley and .
The Jewel Box Clusters is a Shapley class g and Trumpler class I 3 r cluster ; it is a very rich, centrally-concentrated cluster detached from the surrounding star field.
It is a Shapley class c and Trumpler class III 1 r cluster, meaning that it is irregularly shaped and appears loose.
Omega Centauri is classified as a Shapley class VIII cluster, which means that its center is loosely concentrated.
This idea had been opposed by many in the astronomy establishment of the time, in particular by the Harvard University-based Harlow Shapley.
* Shapley, L. S. ( 1953 ), A Value for n-person Games, In: Contributions to the Theory of Games volume II, H. W. Kuhn and A. W. Tucker ( eds.
* Shapley, L. S. ( 1953 ), Stochastic Games, Proceedings of National Academy of Science Vol.
A different method by Harlow Shapley based on the cataloguing of globular clusters led to a radically different picture: a flat disk with diameter approximately 70 kiloparsecs and the Sun far from the center.
One of the few globular clusters visible in the Northern Hemisphere winter, it is a Shapley class V cluster, which means that it has an intermediate concentration towards its center.
* 1885 – Harlow Shapley, American astronomer ( d. 1972 )
* 1972 – Harlow Shapley, American astronomer ( b. 1885 )
It has a magnitude of 6. 6 and is a Shapley class VII cluster.
47 Tucanae has a magnitude of 3. 9, meaning that it is visible to the naked eye ; it is a Shapley class III cluster, which means that it has a clearly defined nucleus.
It is a Shapley class III cluster, which means that it has a clearly defined nucleus.
0.192 seconds.