Astronomy Picture of the Day . Rays from an Unexpected Aurora . ... 5.08.2002 . ... For starters, last Friday morning, no intense auroral activity was expected at all. Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. ... Mirroring the green rays is a red band, somewhat rare in its own right. ... August . ... August 2002 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: aurora . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2008 January 1 . Rays from an Unexpected Aurora . ... Explanation: This aurora was a bit of a surprise. ... Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. ... Note: A German language mirror of APOD is now available . ... NASA Official: Phillip Newman Specific rights apply . ...

... I.A.Dynnikov, Three-page approach to knot theory. ... Universal semigroup, Funktsional'nyi Analiz I Prilozhenija, 34 (2000), no.1, 29-40 (Russian); English translation in Functional Analysis and Its Appl. 34 (2000), no.1, 24-32. I.A.Dynnikov, Finitely presented groups and semigroups in knot theory. ... Math. 2000, no. ... English translation: Russian Math. ... A.Vershik, Numerical invariants of exponential groups, and a locally free approximation of braid groups (in Russian), Zapiski Nauchn. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 20 - 26.08.2012, Forecast on 27.08 - 03.09.2012, Carrington Rotation 2127 (15,04.08.2012) SUNSPOT ACTIVITY OF THE SUN REMAINED AT THE AVERAGE LEVEL. ... ON THE VISIBLE SOLAR DISK CONSTANTLY THERE WERE 4-5 SUNSPOT GROUPS ONE OF WHICH, APPEARING ON THE VISIBLE SOLAR DISK ON AUGUST 25, AVERAGE SIZES. NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY IS EXPECTED TO BE AVERAGE. ... FLARE ACTIVITY WAS ON THE LOW LEVEL IN ALL DAYS. ...

The annual Geminid meteor shower makes its return to the vicinity of the Earth over the period 7th to 16th December, with the peak of activity expected to occur during the morning of 14th December. ... The Geminids appear to radiate from the constellation Gemini, The Twins, which lies high in the west in the early morning December skies. ... The near-Earth asteroid, Phaeton , discovered in 1983 using a NASA satellite, appears to be the source of the shower. ... Photographing Meteors . ...

... EXPN DNO D A T E UT TIME FQ SOURCE CORR-Telescopes VT734 355-MO Dec 21 08:00-21:00 C TAU-A Pointing VT735 356-TU Dec 22 08:00-21:00 C TAU-A Pointing VT736 358-TH Dec 24 09:00-20:00 K ORIONKL Pointing VT737 359-FR Dec 25 09:00-20:00 K ORIONKL Pointing VT738 360-SA Dec 26 09:00-20:00 C 0528+134 Mitk-UD KA SH W018c 364-WE Dec 30 06:00-15:00 L 0552+398 Socr-VLBA W071n 6-WE Jan 06 10:00-17:00 L J0745+10 Mitk-AT HO MP UD SH KA W059e 7-TH ...

Proceedings of Turbulent Shear Flows XI , 1997. NASA Technical Paper # 3555 , 1997. Proceedings of European Turbulence Conference VI , 1996. ESPRI Research Report # 104, 117-143 (1996) . ... Proceedings of Turbulent Shear Flows X , 1995. ASME Paper 95-GT-437 , 1995. ... Invited AIAA Paper 94-2281 presented at the 1994 AIAA Fluid Dynamics Conference, Colorado Springs, CO. AIAA Paper 94-2323, presented at the 1994 AIAA Fluid Dynamics Conference, Colorado Springs, CO. ...

... December 30, 1998 . Supernova 1994D and the Unexpected Universe . Credit: High-Z Supernova Search Team , HST , NASA . Explanation: Far away, long ago, a star exploded. ... Supernova 1994D was not of interest for how different it was, but rather for how similar it was to other supernovae . ... The large number and great distances to supernovae measured in 1998 have been interpreted as indicating that we live in a previously unexpected universe . ... About APOD > . ... NASA Technical Rep.: ...

... Originally a loose-leaf notebook of astronomy activities and resource guides, developed for Project ASTRO (a program at the Astronomical Society of the Pacific to train and partner volunteer astronomers with 3rd through 9th grade teachers) and Astronomy from the Ground Up (a project to help science and nature centers do more astronomy), the Universe at Your Fingertips has a history as an essential resource to thousands of teachers, schools, colleges, planetariums, museums, and youth groups. ...

... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > I see unexpected boxy emission-like features in my REDL spectra - where do they come from? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... The pipeline by default interpolates across the bad columns in the REDL CCD when it creates the master bias, but does not so when it processes the science data. This inconsistency can create boxy emission-like features as seen in the figure below. ...

... S.P. KOROLEV ROCKET AND SPACE CORPORATION ENERGIA . ... OAO RSC "Energia" . ... Company's History . ... History . Brief History of Rocket and Space Technology . ... Flights Chronology . ... Project History . ISS Russian Segment . Steps of ISS Assembly . ... Mounting of MPAC & SEED panels on the external surface of the Service module during extravehicular activity, obtaining video and photographic information on the state of the panels. ... 2015 JSC "S.P. Korolev RSC "Energia" . ...

... Bojan Nikolic web pages home . ... I've posted a short note on using 183 GHz Radiometers to correct for . the atmospheric emission fluctuations that can limit total power . observations. The note is available at: . ... Please enable JavaScript to view the comments powered by Disqus. blog comments powered by Disqus . Copyright 2012, Bojan Nikolic feedback welcome ...

HST Call for Proposals and HST Primer for Cycle 24 . ... Hubble Space Telescope Call for Proposals for Cycle 24 > Chapter 10: Proposal Implementation and Execution > 10.11 Publication of HST Results . ... Publication of HST Results . ... Based on observations made with the NASA/ESA Hubble Space Telescope, obtained [from the Data Archive] at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. ...

General Information . ... Local Information . ... The city represents great cultural value because in the late 19th and early 20th centuries, Kislovodsk as a fashionable spa attracted many musicians, artists, and members of the Russian aristocracy. ... Double room with full pension (breakfast, lunch, dinner) - 2620 rubles per person per night. solnechniy . ... Citizens of most countries need visa to enter the Russian Federation. ... Victor Kornilov, Sternberg Astronomical Institute (chair) . ...

Organization of the Data Processing in the Interball Project. ... Interball Data Archive contains data produced during Interball mission: raw data, data files produced by express-analysys and preprocessing systems, orbit and attitude data files, key physical parameters, Magion-4,5 subsatellites data files and other types of data. Express-analysys data is available for Interball participants within 1 day after telemetry session, level 1 processed data - within 2 weeks. ... Attitude data files . ...

... Watchouts . ... Help . It has been found by several PN exposures that the event list corresponding to a certain quadrant (3 contiguous CCDs) is truncated. This makes one (or more) quadrant(s) to appear fainter even in exposure corrrected images. ... It has been found that it was present only for some of the SAS versions in the past. SAS 6.5 is definitively affected. ... It follows a complete list of the affected exposures up to revolution 1051: . ... Pages maintained by SAS librarian . ...

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

... With information provided by the applicant, references may submit a Reference Report Form via FastLane; reference reports may also be submitted via postal mail. ... electronic mail: felapp@nsf.gov . ... If your browser does not automatically launch the Microsoft Word 97 on-line form, a message will appear to prompt you to save the Word file to a local disk drive. b. Information via E-Mail: You can have the Guidelines for Submission of Applications and application forms sent to you via electronic...

This file gives some hints on setting up the ABPP for pulsar observations and taking data. ... ABPP will always choose the largest bandwidth possible given the RF and the DM of the pulsar. ... The simplest way to control the WAPP datataking program is via tha datataking GUI shown below. ... As soon as the PC echos back to the gui in the ABPP LOG, that it is, in fact, taking data, you will see this reflected in the gui by the pink "SETTING UP MACHINE" being replaced by a green "DATATAKING ACTIVE". ...