... Sun images . ... Sun flares . ... Active areas . June : 2014 . ... The following regions with sunspots can be now observed on the Sun's surface . ... Group length (in degrees) . ... Beta . ... Beta-Gamma-Delta . ... Coordinates and other characteristics of active regions are issued for June 13, 2014 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 June 13, 2014 00:31 UT . ...

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• Sunspots and active regions March 08, 2011
• Sunspots and active regions March 09, 2011
• Sunspots and active regions September 09, 2014

... The new emission line galaxies are listed in Table 2 containing the following information: . column 1: The object's IAU-type name with the prefix HS. ... This was not corrected in the figure shown in Appendix A. HS1214+3801 : This is seemingly a supergiant H II -region at the very rim of the nearby edge-on disc galaxy (SA(s)cd) NGC 4244 (V hel = 224 kms -1 and B T =10.88). ... To check this option one needs a detailed map of the NGC 4244 velocity field including HS 1214+3801. ...

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• Results of follow-up spectroscopy
• First results from follow-up spectroscopy with the NOT
• Summary and conclusions

... Information about a variety of different calendars for different cultures (e.g., Christian, Jewish, Muslim, Chinese, Hindu etc.) ... In addition, the Chinese had two different ways of interpreting and observing celestial events. One way the Chinese used astronomy was known as lifa; it was a discipline that aimed to understand the regularities and the predictable events in the celestial system through careful, observations, measurements and records. ... back to Teachers' Newsletter Main Page ...

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• ASP: The New and Improved Hubble Space Telescope
• ASP: Good Astronomy Activities on the WWW

The Arcetri Catalog contains measures and bibliographic data for all known H2O maser sources north of declination = -30 degrees (to be observable with the Medicina radiotelescope). ... This database is fully described in Cesaroni et al. ... A statistical analysis on the atlas has been carried (Palagi et al 1993). R. Cesaroni, F. Palagi, M. Felli, M. Catarzi, G. Comoretto, S. Di Franco, C. Giovanardi, F. Palla: A Catalogue of H2O maser sources north of delta=-30 , Astronomy and Astrophysics Suppl., ...

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• FIRPO Help 1
• Procedures for Observations
• IBIS: SolarNet Access

These observations are aimed at fully charactering FORS1 photometric system (UBVRI zero-points, color-terms and extinction coefficients) for the Tektronix 2048x2048 pixel CCD (24µm px) . To this aim, the two Landolt/Stetson photometric fields SA95 and SA101 will be observed on a number of epochs and at different airmasses during February and March 2007. ... SA101 . ... OBs for SA101 have to be observed during evenigh twilight (exceptions are expected for the second half of March) . ...

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• ESO - Science Announcements
• ESO - Real Time Follow-up of Transient Objects From PESSTO
• ESO - MUSE

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 15 - 21.06.2015, Forecast on 22 - 29.06.2015, Carrington Rotations 2164, 2165 (21,44.05; 17,64.06.2015) SUNSPOT-FORMING ACTIVITY OF THE SUN WAS AT THE AVERAGE LEVEL. ... FLARE ACTIVITY WAS AT THE AVERAGE LEVEL ON JUNE, 18, 20 AND 21.06, AT THE LOW LEVEL IN OTHER DAYS. ... HOWEVER 21.06/1645 UT ALL GEOMAGNETIC OBSERVATORIES NOTED ARRIVAL TO THE EARTH OF THE INTERPLA- NETARY SHOCK WAVE FROM FLARE EVENTS ON JUNE 18. ...

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• http://www.izmiran.rssi.ru/services/saf/archive/en/2015/obzor20150629.en.txt
• http://www.izmiran.rssi.ru/services/saf/archive/en/2015/obzor20151116.en.txt
• http://www.izmiran.rssi.ru/services/saf/archive/en/2015/obzor20150209.en.txt

Target names are used to provide unique designations for the targets that will be used throughout the proposal. These names will generally also be used in Phase II, and ultimately to designate targets in the HST data archive. ... This facility will be most useful if consistent naming conventions are used. ... If a target is not contained in these catalogs, other catalog designations may be used (e.g., 4U X-ray catalog designation, Villanova white-dwarf catalog number, etc.) ... Target Type . ...

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• Persistence GPI Data Pipeline 1.0 documentation
• Blurring
• Observing Windows [Windows]

... This is not important for drift observations but poses a problem for any observing mode in which the telescope is moving while taking data, since the ALFA beams then will be rotating on the sky. ... The new mode is called ' sky angle tracking ' and is available for all existing observing modes. ... The next figure shows the distance between the beams in declination as a function of hour angle when the telescope is tracking a source with Dec=+10 from rise to set with a sky angle of 19 degrees. ...

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• NAIC Arecibo Observatory User Feedback Form
• Spectral-Line Observing
• Solar System Studies at AO

... solar system . ... Solar eclipse travelogue: Sulawesi delivers a spectacular eclipse . ... Observe the Solar System . ... Tour the Solar System . ... Do the paths of totality during solar eclipses follow a pattern that repeats after a certain period? ... RELATED TOPICS: SOLAR ECLIPSE . Total eclipses follow a period known as the saros, which is 18 years and 11 1/3 days long. ... Get instant access to subscriber content on Astronomy.com! ... Join Astronomy for America's 2017 total solar eclipse! ...

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• Follow an urban deep-sky catalog | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Could the Chicxulub asteroid have helped to trigger the volcanic activity in

... Team . ... GRB mini-workshop 2006 . ... Within the framework of a joint observational program (SAO RAS + Instituto de Astrofisica de Andalucia (IAA), Granada, Spain) on August 25 and 27, 2006, a variable optical object (optical transient) OT GRB 050824 was photometrically observed in SAO. ... An optical identification was made in SAO with a CCD photometer of the 1-meter telescope by data of a satellite observatory SWIFT and with the use of optical data of the inernational monitoring of GRBs. ...

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• Fabry-Perot Interferometer: Gallery Old
• The spectrograph design and the observing procedure

... Rates are estimated to be from 50-100 meteors per hour in prime observing conditions. But this is the so-called ZHR, or Zenithal Hourly Rate, which is the number of meteors per hour which would be seen by an experienced observer, with the radiant in the zenith, in a perfectly clear dark sky. ... The peak is expected to be at 23.30 UT so as the radiant (in the 'Sickle' of Leo) will not even have risen from most of Ireland by then, we will see very few meteors, if any, at that time. ...

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• Abstract
• C.J. Butler, Research Astronomer
• J.G. Doyle, Research Astronomer

Follow-up astrometry and recoveries are made with the ANU 40 inch (1.0-m) f/8 reflector at Siding Spring Observatory (IAU code 413). ... A routine follow-up of 2003 WY153 on 2003 Dec 15 became much more than routine when a faint object with unusual motion vector was found close to the target asteroid. ... During routine astrometry with the 1.0-m to improve the orbit of the Apollo asteroid 2004 CB, the asteroid was found on March 30 to have a short tail! ... Siding Spring Survey Main Page . ...

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• Observational Techniques: Assignment 1
• The Spinning Sun

The following activities are included in the Universe at Your Fingertips guide. ... Clicking on each activity will take you to a "reviews" page where you can post a review, or read reviews posted by others who have used the activity. ... Activity Online . ... MOON AND PHASES . ... Observing Phases and Features . ... Modeling Moon Phases . ... SUN AND SEASONS . ... Observing the Sun Safely . ... Observing Where the Sun Sets . ... Making Pictures of Motion . ... Morning Star and Evening Star . ...

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• Very Low Mass PMS Objects
• ChaMPlane apj_appendix
• ChaMPlane

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

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• About ST-ECF

... Classes . ... Nebula Class Reference . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getCloseViewFov (const StelCore *core=NULL) const . ... getVMagnitude (const StelCore *core, bool withExtinction=false) const . ... getSelectPriority (const StelCore *core) const . ... getEquinoxEquatorialPos (const StelCore *core) const . ... getJ2000GalacticPos (const StelCore *core) const . ... getPositionInfoString (const StelCore *core, const InfoStringGroup &flags) const . ...

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• Stellarium: TelescopeClient Class Reference
• Stellarium: BigStarCatalogExtension::StarWrapper< Star > Class Template
• Stellarium: BigStarCatalogExtension::StarWrapperBase Class Reference

... ARC 3.5m | Weather Closure Conditions . The enclosure will be closed by the Observing Specialist under the following conditions. ... This policy will be consulted whenever there are questions or disagreements concerning closure of the APO 3.5-meter telescope due to hazardous conditions or situations, at times when telescope operations are being overseen by an APO Observing Specialist. ... the on-duty Observing Specialist has full responsibility, and sole authority, to make this decision. ...

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• media
• coordConv
• Observers Instructions for filling out the ARCSAT nightlog

Next: Pulsar bin-mode observations Up: ATCA Bin Mode Observations Previous: ATCA Correlator Bin Modes . Miriad 's atlod task has an option, options=hires which converts a RPFITS file observed in high time resolution bin-mode into an apparently normal dataset with fine time resolution. ... In high resolution time mode, the time difference between consecutive integrations might be smaller than this tolerance. ... Miriad manager . ...

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• Photo Gallery - Astronomical Images
• The Parkes 21cm Multibeam Project
• Follow up observations

Geomagnetic disturbances can be monitored by ground-based magnetic observatories recording the three magnetic field components. The global Kp index is obtained as the mean value of the disturbance levels in the two horizontal field components, observed at 13 selected, subauroral stations . ... Geomagnetic activity is the occurrence of K variations. ... But K still remains a local index, describing disturbances in the vicinity of each observatory. ...

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• Spacecraft Observing Earth's Space Environment
• Sun [Oulu]
• Geomagnetic storms [Oulu]

Astronomy Discussion Forums . ... What I See . ... Follow Ups | Post Message | ... I have observed the Double Cluster, the BeeHive cluster and other open and various Globular Clusters. My main problem with my 114mm reflector is in its inabliity to bring deep sky objects. ... 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" . ...

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• Observe Every Photon's Size Experiment - an Astronomy Net Education Forum
• Plight Of The Massless Teddybear - an Astronomy Net Bigbang Forum Message
• Big Bang: Nagging Doubts Remain - an Astronomy Net Bigbang Forum Message

... The following charts/text are intended as tools for monitoring the Type Ia supernovae ( SNe ) event visually or photographically (utilizing telescope equipped CCD equipment).The files include: A replication of The Type Ia SNe , V- magnitude (with data point checks from other cited references)and color index (B-V) templete (to indicate a general color-related trend of the type Ia ... I believe this might help alleviate some of the problems involving the making of acceptable amateur light curves...

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• List of Amateurs Discoverers of SNe.
• APOD: October 21, 1999 - Follow The Spots
• APOD: 2011 December 6 - Jupiter Rotation Movie from Pic du Midi