Numerical Simulation of Viscous Shocked Accretion Flows Around Black Holes

The work developed in this thesis addresses very important and relevant issues of accretion processes around black holes. Beginning by studying the time variation of the evolution of inviscid accretion discs around black holes and their properties, the author investigates the change of the pattern of the flows when the strength of the shear viscosity is varied and cooling is introduced. He succeed

Dark Matter, Dark Energy - The Dark Side of the Universe part 5 to 8

There's more to the universe than meets the eyeâa lot more. In recent years, scientists have discovered that 95% of the contents of the cosmos are invisible to our current methods of direct detection. Yet something is holding galaxies and galaxy clusters together, and something else is causing space to fly apart. Scientists call these invisible components dark matter and dark energy dark be

A Constrained Space Exploration Technology Program: A Review of NASA's Exploration Technology Development Program

In January 2004, President George W. Bush announced the Vision for Space Exploration (VSE), which instructed NASA to Extend human presence across the solar system, starting with a human return to the Moon by the year 2020, in preparation for human exploration of Mars and other destinations, among other objectives. As acknowledged in the VSE, significant technology development will be necessary to