. To link one or more directories to another directory use the command: ln -s directory_name(s) directory_name . The use of the -s option indicates that this is to be a symbolic link. Only the super-user is allowed make hard links between directories. As a user you are restricted to creating symbolic links between directories using the -s option. Examples . Did You Know? .

... The XFreeOS2 mailing list deals with all aspects of the XFree86/OS2 port of the X Window System, including, but not restricted to . ... Please ensure that your email address is stable and reachable, so don't use for instance some PC in a university cluster which is occasionally offline, or which is good for sending mail only. To send a message to other list subscribers, send your mail to the address . ... Replies to mails from the list will be sent back to the list. ...

Astronomy Picture of the Day . International Space Station in Transit . ... Credit: Tom Laskowski Explanation: A stunning telescopic image of the International Space Station crossing in front of an eight day old Moon, this picture was captured on April 11th. ... Seen below the lunar terminator at the lower left, the International Space Station appears here at a distance of just over 400 kilometers, with the Moon nearly 400,000 kilometers away. ... Publications with keywords: ISS - Moon - transit . ...

. APO Weather Status . Current APO Weather Information . Observing Calendars . Observing Schedules (TBD) . Night Log Form (web form) or (text template) . Archived Night Logs (TBD) . User's Mail Servers . Telescope Closure Policy . IAU Circulars (TBD - restricted to APO) . Catalog of UV and Optical Standards (TBD) . Coming to the Site . Staff Directory . Current Sky Calendar .

... In LABORATORY OF RADIO ASTROPHYSICS OF SPECIAL ASTROPHYSICAL OBSERVATORY OF RAS . ... History . ... Current problems of the group research interests: . study for cosmic microwave background, . study of radio galaxies (identification, evolution, statistical investigation of population), . investigation of the RATAN-600 antenna, . observations in the survey mode with RATAN-600 and their analysis, . creation of the software for data analysis. vo @ sao.ru ( Oleg Verkhodanov ) ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Observing Podcasts . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . Springtime observing for small telescopes . ... Gift Center . ... Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... The classical Beltrami theorem says that any metric whose geodesics are straight lines has constant curvature. But what can we say about geometries whose geodesics are circles (to be more precise --- parts of circles; by a circle we always mean a circle or a line)? ... We prove that a rectifiable simple bundle of circles containing sufficiently many circles in general position is the image of a bundle of lines under some left or right quaternionic fractional transformation. ...

... 13 1000000000 2500000000 2000000000 500000000 1500000000 0 -1500000000 -1000000000 -500000000 0 500000000 1000000000 1500000000 1000000000 500000000 -500000000 0 -1500000000 -1000000000 -500000000 -1000000000 -500000000 0 500000000 1000000000 1500000000 -1500000000 -1000000000 2500000000 2000000000 1500000000 1000000000 500000000 0 -2000000000 -1500000000 -1000000000 -500000000 0 500000000 1000000000 -500000000 -1000000000 . ... 2012. ... URL: http://www.asc.rssi.ru/millimetron/millim.htm 8. ...

... ОБ ОТДЕЛЕ . ... Cеминар теоретического отдела АКЦ ФИАН . ... Новости со школы 'Струны и дуальность' . ... Председатель д.ф.-м.н. В.Н.Лукаш. Секретарь к.ф.-м.н. Е.В.Михеева ( helen@lukash.asc.rssi.ru ), . ... Пропуска заказывать у секретаря АКЦ Страут Людмилы Георгиевны по телефону 333-25-12 до 12 часов предыдущего дня, для прохода в ИКИ при себе иметь паспорт. Новости . ...

Kholtygin A.F., Shneiwais A.B. Stochastic Data in Astronomy: Fourier Analasis of Strongly Unevaen Time Series . Astrophysics, 48 , 87-100 ( 2005 ) . A detail analysis of the CLEAN algorithm for strongly uneven time series is given. ... The results of our analysis are used for searАhing the harmonic components in line profile variations in the spectra of O8III star lambda Ori A obtained in 2001 with 1 m telescope of the Special Astrophisical Observatory of the Russian Academy of Science. ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

Astrophysics Space Missions . ... Space Physics Missions . Data Centers . ... Lectures in Space Science . ... Compton Gamma Ray Observatory (GRO) . ... University of Arizona , Theoretical Astrophysics Program Return to the top of this document . ... JHU/APL AMPTE/CCE Space Science Data Center . ... National Space Science Data Center (NSSDC) . ... Astrophysics Data Facility (ADF) at NASA/Goddard Space Flight Center . ... Center for Atmospheric and Space Sciences/Utah State University (CASS/USU) . ...

PUL VLBI Analysis Center . ... IVS : International VLBI Service for Geodesy and Astrometry . ... An IVS VLBI Analysis Center at the Central Astronomical Observatory at Pulkovo of the Russian Academy of Sciences, also widely known as Pulkovo Observatory, has been organized in September 2006. ... The center is a part of the Pulkovo EOP and Reference Systems Analysis Center (PERSAC) . ... Results of VLBI data analysis can be found at Pulkovo EOP and Reference Systems Analysis Center (PERSAC) page. ...

Rocket R-1 . ... Launch mass, kg . ... On April 14 1948 the Government Decree has been enacted on the development of the first rocket to be made of domestic materials and derived from missile A-4 (FAU-2). The rocket was designated as R-1 including its ground support equipment. ... Launch site . ... During pre-launch processing of rocket R-1, the processing operations and equipment were little different from those used to process rocket A-4. ... Official WEB-site of S.P.Korolev RSC Energia . ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... Chirp ionosonde main technical characteristics . ... Linear frequency modulated continuous signals sounding method is relatively simple and has wide application in various special-purpose systems. ... Chirp signals which are applying for ionosphere channel diagnostics usually have10KHz/s -- 1MHz/s. We must point out that under modulation speed increasing there is an increase in noise suppression and resolution power. ...

... Ж.Ф. Родионова, А.А.Карлов, Т.П. Скобелева и др. ... Sternberg State Astronomical Institute, 119899, Moscow, Russia; jeanna@sai.msu ru. ... Moscow State University, Vorobjovy Gory, 119899, Moscow, Russia. Brown University - Vernadsky Institute Microsymposium 34, October 8-9, 2001, Moscow, Russia . ... Rodionova J1., ... Sternberg State Astronomical Institute, Moscow University, jeanna@sai.msu.ru . ... 1 Sternberg State Astronomical Institute Lomonosov Moscow University, Russia; marss8@mail.ru . ...

Volumes 32 - 189 in the IAU Symposia Series may be ordered from: . ... Proceedings of IAU meetings held since 2004 will be published by . ... http://journals.cambridge.org/jid_IAU . ... IAU Member/Symposium Attendee: $42.00 . ... IAU Member: $80.00 . ... Order Volumes Here . ... ed. Oddbj rn Engvold . 14-25 July 2003 @ Sydney, Australia . ISBN: 978-1-58381-647-9 . top . ... ISBN: 1-58381-189-3 . ... 11-15 November 2002 @ Cancun, Mexico . ... 8-12 July 2002 @ Great Barrier Reef, Australia . ...

... Recent Topics . ... Astronomy in Ukraine: Past, Present and Future . ... В?д: "Cambridge Scientific Publishers" . ... Тема: FW: Astronomy in Ukraine: Past, Present and Future (MAO-2014) . ... Subject: Astronomy in Ukraine: Past, Present and Future (MAO-2014) . ... Re: Astronomy in Ukraine: Past, Present and Future (MAO-2014) . ... I read about your recent conference: Astronomy in Ukraine: Past, Present and . ... Astronomy in Ukraine: Past, Present and Future (MAO-2014) as a special issue . ...

National Aeronautics and Space Administration . ... Gregory Errol Chamitoff (Ph.D.) . NASA Astronaut (Former) . ... NASA EXPERIENCE: In 1995, Dr. Chamitoff joined Mission Operations at the Johnson Space Center, where worked as a Guidance and Control Flight Controller. ... SPACE FLIGHT EXPERIENCE: Expedition 17/18 - In 2008, Dr. Chamitoff served as the flight engineer and science officer for a 6-month mission aboard the International Space Station during Expeditions 17 and 18. ... OCTOBER 2013 . ...

Семинар по гравитации и космологии имени Абрама Леонидовича Зельманова . ... Очередной семинар (? 283 ) состоится в ПОНЕДЕЛЬНИК, 24 февраля 2016 . ... Consequences of the LIGO direct detection of gravitational waves for relativistic astrophysics and gravity theory . ... Direct detection of gravitational waves by the LIGO collaboration has confirmed many theoretical predictions of general theory of relativity and relativistic astrophysics including the theory of black holes. ...