The "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... That produces an extra resistance to the flow of current. ...

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... Aurora from Space . ... Magnetic Storms . ... The "ring of fire" seen by satellite cameras around the polar caps (picture below) is probably created by electrons leaking from the tail's plasma sheet, whose magnetic field lines form a somewhat imperfect trap. ... One possible explanation involves the close association between auroral arcs and electric currents which flow along field lines between the ionosphere and distant space ( Birkeland currents ). ... Why no aurora at the magnetic poles? ...

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... This guide discusses the concept and use of Dynamic HTML, which includes style sheets, content positioning, and downloadable fonts. ... This document discusses each of the three components of Dynamic HTML, describes how to use them, and gives examples of the use of each one. ... Positioning HTML Content contains the following chapters: Chapter 7, "Introduction," introduces the concept of positioning HTML content and discusses the two kinds of syntax you can use to create positioned blocks of content...

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• Index of /ftproot/pub/comp/os/os2/leo/updates/describe

... Over the last decade the uninterrupted, high-resolution coverage of the Sun both from the excellent range of telescopes aboard many spacecraft and from ground-based instruments has led to a wealth of observations of small-scale dynamic events observed from the chromosphere to the transition region and corona. ... SoHO observations have further characterized many transient features, such as bi-directional jets, blinkers, coronal jets, and bright points. ...

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... Apache HTTP Server Version 2.4 . Apache > HTTP Server > Documentation > Version 2.4 > Rewrite . ... It describes how you can use mod_rewrite to create dynamically configured virtual hosts. mod_rewrite is not the best way to configure virtual hosts. ... Virtual Hosts For Arbitrary Hostnames . Dynamic Virtual Hosts Using mod_rewrite . ... RewriteEngine on RewriteMap lowercase int:tolower RewriteCond ${lowercase:%{ HTTP_HOST }} ^www\. ([^.]+) \.example\.com$ RewriteRule ^(.*) /home/ %1 /www$1 . ...

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... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ... Resonant inverse Compton scattering above polar caps: Gap acceleration efficiency for young pulsars . ...

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... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

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Each Apache module is described using a common format that looks like this: . Status: status . ... This indicates how tightly bound into the Apache Web server the module is; in other words, you may need to recompile the server in order to gain access to the module and its functionality. ... A module with "Extension" status is not normally compiled and loaded into the server. ... Modules which are not included with the base Apache distribution ("third-party modules") may use the "External" status. ...

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The Sun 71 Pulsating and explosive energy release in solar ares V.V. Zaitsev1, S. Urpo2, and A.V. Stepanov3 2 Applied Physics Institute, Ulyanova 46, N.Novgorod 603600, Russia Metsahovi Radio Observatory, Metsahovintie 114, FIN-02540 Kylmala, Finland 3 Pulkovo observatory, St.Petersburg 196140, Russia 1 Radio and hard X-ray observations of solar ares reveal various time behaviour of the energy release. ... In the coronal part plasma beta 1 and the loop magnetic 72 The Sun eld is force-free. ...

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Astronomy Picture of the Day . ... 8.01.2000 . ... January 2000 . ... 1999 2000 . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ... U. Based on Astronomy Picture Of the Day . Publications with keywords: scientist - time - century - space . Publications with words: scientist - time - century - space . ... To Fly Free in Space . ... Walking in Space . The Century that Defined Galaxy . ...

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Analysis of general features of the chaotic system behavior and investigation of the properties of concrete chaotic sources. ... Analysis of information properties of chaotic systems and chaotic oscillations as concrete objects for information processing and comunications. ... This hypothesis gives a possibility of designing simple mathematical structures accomplishing various processes of information processing using chaos. ... Activities | ... E-mail: chaos@mail.cplire.ru ...

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Next: Access to Data Sources and the ESO SkyCat Tool . ... We describe an implementation of Dynamic Queries (DQ), a recently developed method as an alternative to the perceived complicated SQL-type operations on relational databases by a very intuitive graphical interface. This prototype implementation, written within the NEMO package, uses ASCII sliders and the PGPLOT graphics interface and uses a novel interactive analysis back-end tool that is dynamically associated with the query. ...

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... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Green ESO . ... Survey Telescopes . ... While the construction of the Atacama Large Millimeter/submillimeter Array (ALMA) on the Chajnantor Plateau was in progress another remarkable project was developing in the San Pedro de Atacama area in the Chilean Andes - an ethnological research project aiming to reconstruct the traditional vision of the Universe of the inhabitants of the local communities. ...

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• Cover of booklet describing Atacama elders' vision of the cosmos | ESO Ireland

Among the fundamental characteristics of a material/medium such as chemical composition, density, conductivity, viscosity, one should probably give the first place to the optical constants - the refractive index and the extinction coefficient . ... The parameter i in Eq.(1) describes the optical properties of the medium where radiation propagates. ... The optical constants and allow one to estimate not only transmittance and absorption of radiation, but also its reflection at the border of two media. ...

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Blackholes2 Forum Message . Forums: . ... Discussion Forums | ... Post . ... It Does Not Accelerate- It Has No Mass . Forum List | ... Post Message | ... Posted by Richard Ruquist on November 18, 2002 01:42:37 UTC . Light already goes at the speed of light. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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Solar Flare Origin - critical analysis" Lev Pusti'lnik We analyze current approach to solar flare origin in 3 aspects: a. Pre-flare equilibrium state of current-magnetic structure above active region and its evolution to flare state, b. Possible reasons of stability loss with transition of system in flare state c. Flare energy release in turbulent current sheet and particle acceleration in this system. ...

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• Principles of organization
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... ,E_=v_B_z,B_z0 Light cylinder at RL U = electric voltage created by rotating BH I = large scale current I U LK Centrifugal acceleration in BH magnetosphere Assume `reasonable' B and E fields, from current I : Bz = 0 = v/v 1 Motion of a test particle P ( ) Light cylinder Pz() P() z() Here = 0.01 and = rc,i/RL = 0.01 Growth of particle Lorentz factor ( ) log k At light cylinder : = Here with initial value is the absolute maximal reachable by this process (ie no ...

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... Bad Astronomy . ... Mad Science . ... Universe Today . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... As we look farther out, to more distant objects, we see that they are rushing away from us. ... If the Universe is open, it will expand forever. ... If the Universe is flat, it is forever balanced between open and closed; it will expand forever, but always slowing, just balancing gravity. ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! ...

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RADIOASTROPHYSICAL DEPARTMENT • INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . General information Main characteristics of the Radio telescope Observing programs General view of the antenna array Main research areas Principle of generation of radio images Radio telescope 's beam Receiving systems Main characteristics of the base receiving-recording complex Calibrations Data archive and databases Publication SSRT - Siberian Solar Radio Telescope . ...

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Next: Data analysis and Spatial Up: Spatial Corrections of ROSAT Previous: Spatial Corrections of ROSAT . ... We start with an observation for which the PRF is much worse than it should be; caused by residual wobble errors or other causes. ... Spatial analysis of ROSAT HRI observations are often plagued by poor aspect solutions, precluding the attainment of the potential resolution of about 5''. ... A recent example showed one obi for which the source was 10 north of its position in the other 17 obis. ...

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