... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. December 31, 1999 . The Millennium that Defined Earth . ... The Earth started as the center of everything , but became a planet placed in the Solar System , which became placed in a Galaxy , which became placed in the Local Group of Galaxies , which became placed in an expanse so vast we call it just the Universe . ... About APOD > . ...

... Consequently, it is inappropriate to expand and in ordinary spherical harmonics. The proper expansion expresses both and simultaneously in terms of a particular order of generalized spherical harmonics. ... Generalized spherical harmonics start at , and for each , . ... Generalized spherical harmonics obey a sum rule analogous to a familiar one for ordinary spherical harmonics, but it includes an explicit phase factor which depends on the orientation of the two lines of sight. ...

... HST Phase II Proposal Instructions for Cycle 20 > Chapter 2: The Basics of Phase II Proposals > 2.4 Examples and General Advice . ... For more information, see Section 3.4 on page 36 . First, you have to acquire an object successfully that is at or near the position at which the science observation will be made. ... An offset is explicit when you use a Special Requirement such as POS TARG (see POSition TARGet <X-value>,<Y-value> ) to move the telescope away from the position acquired. ...

Astronomy Picture of the Day . ... 31.12.1999 . ... Credit: Apollo 8 Crew, NASA Explanation: When the second millennium began , people generally knew that the Earth was round , but few saw much of it beyond their local village. ... The Earth started as the center of everything , but became a planet placed in the Solar System , which became placed in a Galaxy , which became placed in the Local Group of Galaxies , which became placed in an expanse so vast we call it just the Universe . ... 1999 2000 . ...

ATNF Home . About ATNF . ... About ATNF overview . News | ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Information & tools for observers . ... Australia Telescope Online Archive (ATOA) . ... ATCA | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ...

... The French-Russian Poncelet Laboratory organizes a conference on "Algorithms and Arithmetic", Mai 17-19, 2010, to take place in the Independent University of Moscow. ... Just regarding any symbolic computation software (like Pari, Magma, Sage), one can see that there exists a real desire to manipulate on computers a large family of mathematical objects (sometimes very abstract) coming from number theory: number fields, p -adic numbers, Galois groups, schemes, modular forms, etc. ... Galois Theory. ...

... Of course, the scope of chaos is vast, and we do not dare to cover it all. ... He will highly appreciate your help in compiling the list of URLs to such scientific groups and institutions. http://www.cplire.ru/win/InformChaosLab/ - InformChaos Lab (Moscow) . http://chaos.ssu.runnet.ru/ - Laboratory of Nonlinear Dynamics at Saratov State University (Saratov) . ... http://optics.npi.msu.su/sci/chaos.html - Chaos in laser systems . ... http://www.chaotic.com - Randle, Inc. ... Time: 2-6 July, 2001 . ...

IAU page . Commission 5 page . ... The IAU Division XII Commission 5 Working Group Libraries business meeting at the IAU General Assembly was held Monday, 3 August 2009 . ... Data curation: Keeping data over time . ... The IAU Commission 5 Working Group on Libraries exists to foster communication and understanding between research astronomers and the librarians who support them. ... Chris Erdmann gave presentation on Facility Identifiers. тАв Tracking use of ESO data through published papers . ...

... The MIDAS system is built along lines which should allow easy integration of complex analysis algorithms as well as allowing greater flexibility in interactive use and in the creation of user specific procedures from the basic building blocks. ... The present version which became available in 1984 follows a similar philosophy in its application program interfaces, but has been expanded to the new Standard Interfaces which have a broader base than previously. ...

General Forum Message . Forums: . ... Post . ... Telescope Types . ... Many types exist, but a good 8 inch Newtonian on a simple Dobsonian mount provides great views in a simple package. ... While the SCT is not my favorite design for the type of astronomy I pursue, I do think it is the right kind of telescope for the average consumer. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Recent Topics . ... MAO main . ... Message from the General Secretary to the IAU membership . ... Тема: Message from the General Secretary to the IAU membership . ... IAU Directory for World Astronomy and NameExoWorlds contest . ... The IAU Directory for World Astronomy ( directory.iau.org/ ) has been created not only for astronomy clubs and organisations, but also more generally for associations having an interest in astronomy (history, culture, etc.) ... www.iau.org/ . ... MAO NASU . ...