György Paál
Encyclopedia
Paál György (Budapest
, 1934 – Budapest, 1993) was a Hungarian astronomer
and cosmologist.
and galaxy cluster
distributions. In 1970 from redshift quantization
he came up with the idea that the Universe
might has nontrivial topological structure.
In 1992, G. Paal, et al. and A. Holba, et al. reanalyzed the redshift data from a fairly large sample of galaxies and concluded that there was an unexplained periodicity of redshifts.
From the observed galaxy distribution in 1992 Paal et al. was the first who suggested non zero cosmological constant.
Two years later in another paper they suggested
.
Budapest
Budapest is the capital of Hungary. As the largest city of Hungary, it is the country's principal political, cultural, commercial, industrial, and transportation centre. In 2011, Budapest had 1,733,685 inhabitants, down from its 1989 peak of 2,113,645 due to suburbanization. The Budapest Commuter...
, 1934 – Budapest, 1993) was a Hungarian astronomer
Astronomer
An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...
and cosmologist.
Work
In the late 50-s Paál studied the quasarQuasar
A quasi-stellar radio source is a very energetic and distant active galactic nucleus. Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than...
and galaxy cluster
Galaxy cluster
A galaxy cluster is a compact cluster of galaxies. Basic difference between a galaxy group and a galaxy cluster is that there are many more galaxies in a cluster than in a group. Also, galaxies in a cluster are more compact and have higher velocity dispersion. One of the key features of cluster is...
distributions. In 1970 from redshift quantization
Redshift quantization
Redshift quantization is the hypothesis that the redshifts of cosmologically distant objects tend to cluster around multiples of some particular value...
he came up with the idea that the Universe
Universe
The Universe is commonly defined as the totality of everything that exists, including all matter and energy, the planets, stars, galaxies, and the contents of intergalactic space. Definitions and usage vary and similar terms include the cosmos, the world and nature...
might has nontrivial topological structure.
In 1992, G. Paal, et al. and A. Holba, et al. reanalyzed the redshift data from a fairly large sample of galaxies and concluded that there was an unexplained periodicity of redshifts.
From the observed galaxy distribution in 1992 Paal et al. was the first who suggested non zero cosmological constant.
Two years later in another paper they suggested
.