... 2014 February 24 . The Cloudy Cores of Active Galaxies . Image Credit: NASA's GSFC , W. Steffen ( UNAM ) . Explanation: What would it look like to travel to the center of an active galaxy? Most galactic centers are thought to house black hole s millions of times more massive than our Sun. The spaces surrounding these supermassive black holes may be far from dormant, however, flickering in many colors and earning the entire object class the title of Active Galactic Nuclei (AGN). ...

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• APOD: 2001 June 20 - Total Eclipse of the Active Sun
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... Total Eclipse of the Active Sun . ... 20.06.2001 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: total solar eclipse - prominence - active sun . Publications with words: total solar eclipse - prominence - active sun . ... Tutulemma: Solar Eclipse Analemma . Eruptive Prominence . Equinox and Eruptive Prominence . A Twisted Solar Eruptive Prominence . An Erupting Solar Prominence from SOHO . A Solar Prominence from SOHO . ...

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... Sun images . ... Active areas . February : 2016 . ... The following regions with sunspots can be now observed on the Sun's surface . Group number . ... Group length (in degrees) . ... Beta . ... Coordinates and other characteristics of active regions are issued for February 09, 2016 00:31 UT The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates and other characteristics of active regions are issued for February 09, 2016 00:31 UT . ...

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• Sunspots and active regions February 10, 2013
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I added a new directory search to Zope, which returns the important fields for an individual user. ... I finished changes to the ldap search product and asked it to be moved to production. ... I ran some reports to track down our problem childrenin Active Directory. ... I'm working on a fix to the employee update sscript. ... The problem with the employee update script proved to be more elusive than I thought. ... I finished changing the employee update script to remove employees who have left. ...

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On Thursday, 1998 February 26, a total eclipse of the Sun was visible from within a narrow corridor traversing the Western Hemisphere. The totality path (or path of the Moon's umbral shadow) began in the Pacific, continued through northern South America and the Caribbean Sea, and ended at sunset off the Atlantic coast of Africa. ... Some of the best placed sites along the totality path were in Venezuela. ... Exposure time was 1/2 second. At this location totality lasted 3min 36sec. ...

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... ESO PR Photo 07a/01 . ... ESO PR Photo 07b/01 . ... Caption : PR Photo 07a/01 shows Comet Hale-Bopp , still active at a distance of nearly 2,000 million kilometres from the Sun. ... This is quite unusual for a comet and is clearly confirmed on the present photo ( PR Photo 07a/01 ) from the WFI camera on the MPG/ESO 2.2-m telescope at La Silla, obtained a few days ago. ... ESO-Chile . ... ESO PR Photos 07a-b/01 may be reproduced, if credit is given to the European Southern Observatory (ESO). ...

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... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... 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 . ... active optics . ...

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... International astronauts are those individuals from international space agencies who have trained or served with NASA Astronauts. Astronaut assignments and category definitions (e.g., "active" astronauts, "management" astronauts) are contained in a separate Flight Operations Directorate (FOD) policy letter. Former astronauts are those who are no longer employed by their agency. Active and Management International Astronauts . Astronaut . ... Former International Astronauts . ...

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Plans are under way to create a new way of performing non-interactive observations which will be called auto-observing . ... Non-interactive observing with CIMA has for a long time been available with the use of CIMA command files. Contrary to normal command file observing which requires a command file with a set of commands to be executed sequentially, auto-observing will use a list of sources and a list of instructions on how to observe each of the sources. ...

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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... To view Postscript Format files you must have access to Ghostview or another suitable viewer. To view PDF files you will need Acrobat Reader or another suitable viewer. ... E. O'Shea, D. Banerjee, J.G. Doyle, B. Fleck and F. Murtagh . A 2001 368, 1095 . Full Paper - Postscript . ... L. Teriaca, M.S. Madjarska and J.G. Doyle . ... Full Paper - PDF . ... I. Roussev, R. Erd lyi, J.G. Doyle and K. Galsgaard . ...

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... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Product Reviews . ... View more active galactic nuclei . ... In the July 2013 article, Secrets of the brightest objects in the universe, I describe what astronomers currently know about quasars, which are the most luminous type of active galactic nuclei (AGNs). ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Moon . Planets . ... Monthly Sky Notes . ... February . ... The ringed planet will be quite bright, but unlike Jupiter it will not be the brightest point of light in the sky, this accolade will return to Sirius which is the brightest star in our night sky in the constellation of Canis Major. ... Seven days later on February 18, the Moon will be in its full Moon phase. ... Tweets that mention Wonders of the February Night Sky | ... Astronotes . ...

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... Gallery . ... Home Astro-Imaging Page 11 . ... Lecture Series 2014-2015 . ... Clear Sky Chart . This Month's Sky . ... This Month's Sky - 2015 . This Month's Sky - January 2015 . This Month's Sky - February 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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... We publish 16 Doppler imaging temperature maps for the years 1994-2002 of the active RS CVn star II Peg. ... Through Doppler imaging we want to study the spot evolution of the star and in particular compare this with previous results showing a cyclic spot behaviour and persistent active longitudes. ... The derived temperature maps are quite similar to the ones obtained earlier with a different methods, the main differences occurring in the spot latitudes and relative strength of the spot structures....

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LONGґTERM RADIO TIME SCALES OF ACTIVE GALACTIC NUCLEI T. Hovatta 1 , M. Tornikoski 1 , M. Lainela 2 , E. Valtaoja 2 , I. Torniainen 1 , M.F. Aller 3 , H.D. Aller 3 1 Mets?ahovi radio Observatory Mets?ahovintie 114 02540 Kylm?al?a, Finland 2 Tuorla Observatory, University of Turku, Finland 3 Department of Astronomy, University of Michigan tho@kurp.hut.fi We have studied longґterm variability time scales of a large sample of Active Galactic Nuclei at several frequencies between 4.8 and 230 GHz. ...

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... SEARCH ASP SITE: Match ALL words Match ANY word . ... Point: Where Is the Best Place to View a Solar Eclipse? ... As viewers venture away from the center line of the eclipse path, the eclipse lasts for a shorter time (smooth line), but edge effects such as Baily's beads persist for longer (spiked line). ... The eclipse is longest on the center line of the path; the rare view of the Sun's beautiful white outer atmosphere, the corona, which can be seen only during eclipses, is also longest there. ...

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XMM-Newton EPIC TTD Meeting Preparation for next eclipse season 7th Feb 2001 Mauro Casale ESA H/Q: 7th February 2001 XMM 1 Facts / lessons learned from previous eclipses 1) the eclipses will occur before perigee in the period 19-03- 2001 / 24-04- 2001 2) the shortest time between end of eclipse and Perigee time is about 22 minutes; in most of the other cases it is around 30-31 ... T0 - 1.6/1h: Eclipse start. ... ESA H/Q : 7th February 2001 XMM 7 ...

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• Parameters

The Navy Prototype Optical Interferometer . Articles | ... The feedbeam tubes relay the light from the siderostat building on the right to the optical laboratory on the left. Fast Delay Lines (6) . ... They have a little robot cart which can travel the distance of the tube. ... The job of the cart and the delay line tube is to adjust the total distance the light travels from each siderostat to the light sensors. ... www.astronomy.net . ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Astronomy articles, forums, listings, and other resources about Astronomy.

The period of this variable was first determined by Tony Vanmunster (Center of Backjard Astrophysics). We have taken the observations with CCD ST-7 and 60-cm reflector of SAI Crimean station. ... The longest set was taken at night of 2000 February 12 including 291 R 60 second long frames with the magnitude limit of 18. Summing all these frames in a single one I have taken a "deep sight" of this region having the limit of 21.7R. The effective exposition is 4 h. 51 m. Look at this frame! ...

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• Publication Search
• Публикации
• LWN: Driver porting: supporting asynchronous I/O

Hipparchus (and possibly Aristarchus before him) also derived the Moon's distance from the duration of a lunar eclipse . Because the Earth casts a much larger shadow than the Moon, such an eclipse usually darkens the entire Moon, for several hours. ... If the Sun is assumed to be very distant, and if the Moon crosses the middle of the shadow (if not, corrections must be made), the width of the shadow is expected to be about 2r , twice the Earth's radius r . ... Last updated 4 February 1999 Moon. ...

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