. " The Arecibo Observatory is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations . expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... The Effect of Synchrotron Losses on Multiple Diffusive Shock Acceleration . ... The effect of synchrotron losses on diffusive shock acceleration (DSA) at many shocks is treated numerically. Synchrotron losses determine a maximum energy to which electrons can be accelerated through DSA, and this is referred to as the synchrotron cutoff, . ... Alternative treatment of DSA with synchrotron losses . ...

... Research School of Astronomy & Astrophysics . ANU College of Physical & Mathematical Sciences . EXPLORE ANU . ... Research . ... ANU College of . ... SEARCH . ... Search query . Search . Search query Search button . ... Intranet . MSO intranet . ANU Outlook 365 login . ... The Research School of Astronomy and Astrophysics (RSAA) website has moved to http://rsaa.anu.edu.au . Please visit the RSAA site for more information about the school, our research, or observatories. ...

... тАЬFor discovering that the expansion rate of the universe is accelerating, implying in the simplest interpretation that the energy density of space is non-vanishing even in the absence of any matter and radiationтАЬ, shared with Saul Perlmutter and Brian Schmidt . ... Academy of Achievement, Gold Plate Award, 2012 . ... AURA Science Award, 2000 . STScI Science Merit Award, 2000, 2001 . ... Science Magazine's Research ``Breakthrough of the Year'', 1998 . ... Time Magazine Innovator Award, 2000€а . ...

... Local organizer: Dr. Mikhail Sosonkin, Main Astronomical Observatory, Ukrainian National Academy of Science (NAS of Ukraine), Kiev . ... Leader of the group "ozone research" at the Institute for Atmospheric and Climate (IACETH), Swiss Federal Institute of Technology Zurich (ETHZ), Switzerland . ... Head of Laboratory for Atmosphere Optics, Main Astronomical Observatory, Ukrainian National Academy of Science (NAS of Ukraine), Kiev . ... Coffee break (10.45-11.15) . ... Coffee Break (14.30-14.50) . ...

YORP: Influence on Rotation Rate . ... We have developed a semi-analytical model for calculating angular acceleration of asteroids due to Yarkovsky O'Keefe Radzievskii Paddack (YORP) effect. ... Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), near-Earth asteroids (NEAs), rotation rate, calculating angular acceleration of asteroids, Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, elliptic orbits, thermal inertia of the asteroid's surface, the asteroid 1620 Geographos. ...

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. ...

... 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? ...

John Kielkopf entered the University of Louisville as an early-admissions student in 1963 before finishing high school. ... Currently also an Adjunct Professor at the University of Southern Queensland, Australia, he has been an Associate Research Scientist at Hopkins, a Visiting Scientist at Argonne National Laboratory, and an Adjunct Astronomer at the Observatory of Paris - Meudon. ... Their daughter, Clara Kielkopf , is a professor in the Department of Biophysics at the University of Rochester. ...

Electron-Bombarded, Back-Illuminated CCD Sensors . For Low-Light-Level Imaging Applications . ... Damage to the gate structure oxide layers from keV level X-rays will likely result in increased dark current and decreased full-well capacity. ... Figure 14 shows the increase in dark current versus incident electron energies. ... The back-thinned CCD's 'lifetime' is defined, herein, to be a 50 electron per pixel increase in CCD dark current per 16.7 millisecond integration period. ...

Solar Maximum Mission . USA Solar Mission . Courtesy of NASA's National Space Science Data Center . The Solar Maximum Mission (SMM) was designed to provide coordinated observations of solar activity, in particular solar flares, during a period of maximum solar activity. ... Complementary studies were made as part of the SMM guest investigator program, and coordinated in situ measurements of flare particle emissions were made from the ISEE 3 spacecraft. ...

... ,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 ...

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" . ...

Russian Military Space Activity . r The experts in space and rocketry field as well as ones interested in the Russian cosmonautics know quite a well The Military Aspects of the Soviet Cosmonautics book by Maxim Tarasenko published in 1992. This book still is an unique independent Russian research in the military space programs' field. ... Instead, as a result of the author's many years efforts, The Russian Military Space Activities book manuscript was practically finished early in 1999. ...

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Astronomy Education News . ... The show celebrated the Armagh winners of a national astronomy competition in which the children from both schools took part. The prizes, sponsored by Discover Science and Engineering, were given by the competition organiser, Terry Moseley of the Irish Astronomical Association, and the all-Ireland coordinator of the International Year of Astronomy, Dr Miruna Popescu of Armagh Observatory. ... Armagh Observatory - Astronomy Education . ...

National Space Agency of Ukraine and . ... The Second International Meeting on WARNING Mission . ... Space Research Institute of Ukrainian National Academy of Sciences - National Space Agency, . ... The Head of Scientific committee of the Project “Warning” is DR V.G.Bar`yahtar, Academitian of Ukrainian National Academy of Sciences. ... Lviv Center Space Research Institute of Ukrainian National Academy of Sciences, . ... National Space Agency of Ukraine, Bozhenka St. 11, 252022 Kyiv-22, Ukraine. ...

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National Aeronautics and Space Administration . ... Bruce McCandless II (Captain, USN, Ret.) NASA Astronaut (former) . ... He was a member of the astronaut support crew for the Apollo 14 mission and was backup pilot for the first manned Skylab mission (SL-1/SL-2). ... A veteran of two space flights, McCandless has logged over 312 hours in space, including 4 hours of MMU flight time. ... With the completion of this flight McCandless logged 191 hours in space (including 4 hours of MMU flight time). ...

... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Dave's Universe . ... Dark energy and the accelerating universe . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...