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81. Optical and radio properties of spirals in the Virgo cluster

Creator:
Giuricin, G., Mardirossian, F., Mezzetti, M., and Ramella, M.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, galaxies, and Virgo cluster
Language:
Czech
Description:
Improving precious studies based on galaxies belonging to various aggregations, our examination of the radio and optical properties of Virgo spirals indicates that the ratio of the radio continuum-to-optical luminosiy of spirals is linked to their HI content. Specifically, HI deficient spirals tend to be weaker radio continuum emitters.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

82. Particle density variations along the orbit of the Halley meteor stream

Creator:
M.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, meteor streams, and Comet Halley
Language:
Czech
Description:
Mechanisms leading to higher particle concentrations in several places along the meteor stream associated with comet Halley are discussed. The positions of the mass concentrations represented by the mean anomaly of the stream orbit, as determined from long series of observations of the Orionids and Eta Aquarida, are correlated with the deviations in the semi-major axis and nodes of the evolving orbit of the comet. It is shown that random deviations in the orbital elements of the comet may be responsible for the nonstable mass concentrations in the stream.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

83. Perspektivy vývoje optiky pro rentgenovou astrofyziku

Creator:
Šimon, Vojtěch
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, International Workshop on Astronomical X-Ray Optics (2014 : Praha, Česko), věda a společnost, astronomie, sympozia, rentgenové dalekohledy, science and society, astronomy, symposia, X-ray telescopes, rentgenová astrofyzika, 12, and 00
Language:
Czech
Description:
Účelem každoroční mezinárodní konference o optice pro rentgenovou astronomii AXRO (International Workshop on Astronomical X-Ray Optics) jsou přednášky a následné diskuse o technologiích pro astronomická pozorování v rentgenovém oboru spektra. Sympozium, které se konalo 8.-11. prosince 2014 v pražské vile Lanna za účasti 40 odborníků z EU, USA, Ruska, Číny, Saúdské Arábie a Japonska, prokázalo důležitost propojování základního a aplikovaného výzkumu. AXRO 2014 uspořádaly Astronomický ústav AV ČR, České vysoké učení technické v Praze a Ministerstvo dopravy ČR. and Vojtěch Šimon.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

84. Physics of outflows from active galactic nuclei

Creator:
Ferrari, Attilio
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, outflows, and active galactic nuclei
Language:
Czech
Description:
This review is devoted to discuss our present understanding of how outflows participate in defining ths various types of morrphologies and featurea observed in Active Galactic Nuclei (AGN). We suggest possÍble interpretations of structurcs observed at radio frequencies (non-thermal continuum radiation) and optical frequencies (continuum and emission line radiation) in terms of results from numerical simulations of outflow propagation and their analytical physical explanation. The conclusion is that we have already reached a good qualitative knowledge oř the several dynamical effects which shape AGN’s structures; the quantitative estimate of their relative importance and conditions of occurrence still awaits a better study of the nonlinear processes in astrophysical conditions and more observational data to determine the values of the physical parameters.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

85. Planetary origin of fireballs and comets

Creator:
Padevět, V.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, fireballs, and comets
Language:
Czech
Description:
All known groups of fireballs contain bodies which may reach the Earths surface as meteorites and are of planetary origin. Since some fireballs have cometary orbits in the Solar System, then comets are probably of planetary origin. The possible explosion of a large planet is discussed again. This time on the basis of gravitationally decelerated expansion of an originally superdense embryo.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

86. Po 100 letech potvrzeny gravitační vlny

Creator:
Vladimír Wagner
Format:
print, bez média, and svazek
Type:
article, články, journal articles, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, jaderná fyzika, astronomie, gravitační vlny, nuclear physics, astronomy, gravity waves, 12, and 00
Language:
Czech
Description:
For the first time, scientists have observed ripples in the fabric of space time called gravitational waves, arriving at the earth from a cataclysmic event in the distant universe. This confirms a major prediction of Albert Einstein´s 1915 general theory of relativity and opens an unprecendented new window onto the cosmos. Gravitational waves carry information about their dramatic origins and about the nature of gravity that cannot otherwise be obtained. Physicists have concluded that the detected gravitational waves were produced during the final fraction of a second of the merger of two black holes to produce a single, more massive spinning black hole. This collision of two black holes had been predicted but never observed. The gravitational waves were detected on September 14, 2015 at 09.51 UTC by both of the twin Laser Interferometer Gravitational-wave Observatory (LIGO) detectors, located in Livingston, Louisiana, and Hanford, Washington, USA. The discovery was made by the LIGO Scientific Collaboration (which includes the GEO Collaboration and the Australian Consortium for Interferometric Gravitational Astronomy) and the Virgo Collaboration using data from the two LIGO detectors. Special prominence is given to this topic in the article by Dr. Vladimír Wagner of the Nuclear Physics Institute of the CAS. and Vladimír Wagner.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

88. Poslední okamžiky před uskutečněním objevu

Creator:
Weisskopf, Martin and Cejnarová, Andrea
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
George C. Marshall Space Flight Center, astronomie, astronomické observatoře, rentgenové dalekohledy, astronomy, astronomical observatories, X-ray telescopes, 6, and 53
Language:
Czech
Description:
Vědecký vedoucí projektu Martin Weisskopf hovoří o rentgenové observatoři Chandra, astronomii, kosmologii a krásném a udivujícím vesmíru., Martin Weisskopf ; přeložila Andrea Cejnarová., and Rozhovor byl uveřejněn na stránkách Science@NASA 14. června 1999.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

89. Pre-perihelion photometry of Comet Halley at the Skalnaté Pleso observatory

Creator:
Svoreň, J.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, Comet Halley, and pre-perihelion photometry
Language:
Czech
Description:
A second part of the pre-perihellon photoelectric measurements of P/Halley obtained at the Skalnaté Pleso Observatory is presented. The observations cover 9 nlghts from November 8, 1985 to January 5, 1986. A set of focal diaphragms of the followlng diameters was used: 29.53", 48.98", 81.08", 137.34" and 220.53". Results of thls paper are magnltudes in focal diaphragms in the fllters Cont. 365.0 nm, Cont. 484.5 nm, CO^, C2, C3 and CN. Coma diameters, photometric parameters and continuum colors are also determined.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

90. Přínos Arthura Stanleye Eddingtona k rozvoji astronomie 20. století

Creator:
Jáchim, František
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
Eddington, Arthur Stanley, 1882-1944, astronomové, astronomie, astronomers, astronomy, 6, and 53
Language:
Czech
Description:
Astrofyzika je fyzika "ve velkém", fyzika v laboratoři vesmíru s neuvěřitelně rozsáhlou škálou hmotností, rozměrů i teplot. Ve dvacátých a třicátých letech 20. století její rozvoj nejvíce ovlivnil vynikající anglický astronom a matematik Arthur Stanley Eddington (1882-1944). Po šedesáti letech od jeho smrti stále nalézáme ve vědecké i populárně vědecké literatuře citace jeho článků a knih, neboť to byl on, kdo položil základy řešení mnoha astrofyzikálních problémů. Jím potvrzený ohyb světelných paprsků v blízkosti Slunce patří do série nejvýznamnějších astronomických objevů 20. století., František Jáchim., and Obsahuje bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public