Galaxies and the Universe: The Milky Way Galaxy, The Nature of Galaxies, Galactic Evolution, The Structure of the Universe, Active Galaxies, Cosmology, The Early Universe; Astronomical and Physical Constants, Unit Conversions Between SI and cgs, Solar System Data, The Constellations, The Brightest ...
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of galaxies and star clusters surrounded by immense voids is considered to be akin to theumbilical cordthat fed our galaxy during its youth. Many phenomena—involving stars, nebulae, galaxies, cluster of galaxies, and black holes—occurring in the universe, seems to be analogous to the phenomena...
CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei, China Hongxin Zhang Contributions K.W. led the data analysis of the images and spectra of UCDs and nucleated dwarf galaxies, developed the main interpretation of...
Geometry, being a key variable in this context, can therefore assume a far richer variety than what is generally assumed for the Sun, stars, galaxies, and, for that matter, the entire cosmology. When geometry becomes as complicated as that characterizing the late-growth-phase magnetotail, or ...
It is well-known that several non freeze-out models has been proposed in literature, such as the FIMP (Feebly Interacting Massive Particle) cosmology via a freeze-in m echanism135,136, in which the comoving DM abundance freezes when the number densities of the visible sector, generating...
This article represents a lightning introduction to the black hole information paradox. Many details are omitted for brevity; longer articles will (eventually) explain them. Also, caution! the current understanding of the problem is so confused that the
Subjectheadings:cosmology:observations—galaxies:evolution—galaxies: high-redshift—large-scalestructureofuniverse 1.Introduction Thestudyofthelarge-scaleclusteringofhighredshiftgalaxiesisessentialtounderstand theformationandevolutionofgalaxies.Todate,manypossibledetectionoflarge-scaleclus- ...
If gamma-ray bursts are at cosmological distances, they must be gravitationally lensed occasionally1,2. The detection of lensed images with millisecond-to-second time delays provides evidence for intermediate-mass black holes, a population that has been
Weak lensing and cosmic shear promise to be a powerful probe of astrophysics and cosmology, constraining models of dark energy, measuring the evolution of structure in the universe, and testing theories of gravity on cosmic scales. However, the intrinsic alignment of galaxies鈥攖heir shape and ...