... Galaxy Evolution home . ... The origin and evolution of radio sources . Radio sources and their environments . ... We are investigating how this interaction effects galaxy evolution in general as well as the feedback effect of the radio source on its host galaxy and AGN. ... One direct observational manifestation of this interaction is the existence of extended regions of emission-line gas which show a clear spatial relationship to the radio source itself. ...

... This implies powerful stability and collimation taking into account that different instabilities can affect the evolution of jets. ... Thus, jet stability has been a significant research subject during the last decades. In this talk, I will present some recent results on the linear and non-linear stability analysis of non-relativistic magnetized jets carrying helical magnetic fields. ... I will discuss the non-linear evolution of jets with the aid of three-dimensional numerical simulations. ...

To change to using another printer for the current login session: PRINTER=ps2 . ... To change to using another editor for the current login session and inform (export) this value to other programs which use it: EDITOR=vi export EDITOR . This changes the user's default editor to vi and exports this value to other programs - such as electronic mail - which make use of it. To change to using another pager for viewing files the user adds the following lines to their .profile file. ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE CHANGING UNIVERSE: EVOLUTION HAPPENS! . c) Changes in the Universe . ... In a universe that is not evolving, we should see as many of these hyper-active galaxy cores in each period of cosmic history. ... An Ancient Universe - Table of Contents . ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

For Cycle 9 the Science Program Selection Office (SPSO) has changed the selection process to ensure that HST will continue to perform the best possible science with the best return for the astronomical community. This report summarizes the changes to the selection process and offers suggestions on writing an effective proposal that accounts for these changes. ... Fewer panels: With more orbits to allocate, each panel will have more flexibility, especially to approve the somewhat larger proposals. ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... SMIS : Space Monitoring Information Support laboratory . Russia's Weather : State Meteorological Center Weather Forecast . Space Weather service : ACE real time solar wind data and simple geomagnetic activity forecast. ... World Fire Web : Space Research Institute (IKI) node . Sputnik : Joint project of SRC Planeta, Rosgidromet and Space Research Institute (IKI) . ... Today's Space Weather : Presented by the Space Environment Center . ... Back to the Space Research Institute Home Page ...

... AA(Max-Planck-Institut f r Radioastronomie, 53121 Bonn, Germany), AB(Max-Planck-Institut f r Radioastronomie, 53121 Bonn, Germany), AC(Max-Planck-Institut f r Radioastronomie, 53121 Bonn, Germany), AD(Special Astrophysical Observatory, Nizhnij Arkhyz, 357147, Russia), AE(Stockholm Observatory, 13336 Saltsj baden, Sweden) . ... 241B Structural and chemical changes during the AGB and post-AGB evolution are discussed with respect to two recent observational and theoretical findings. ... Abstract Text ....