... The highlight of the month is the total eclipse of the Moon during the night of December 20/21. ... Listed below are some of the key events, and the times they will occur, during December's total lunar eclipse. ... The eclipse is also visible in its entirety from Alaska (local time is UT òÀÓ 9 hours) and Hawaii (UT òÀÓ 10 hours), but be aware that most of the eclipse occurs on the 20th in these two regions. ... Penumbral Eclipse Begins . ... Partial Eclipse Begins . ... Total Eclipse Begins . ...

... 2007 February 12 . Comet McNaught Over New Zealand . ... Explanation: Comet McNaught is perhaps the most photogenic comet of our time. ... Comet McNaught was imaged two weeks ago between Mount Remarkable and Cecil Peak in this spectacular image taken from Queenstown , South Island , New Zealand . The bright comet dominates the right part of the above image , while the central band of our Milky Way Galaxy dominates the left. ... About APOD | ... NASA Web Privacy Policy and Important Notices . ...

... Many of these radi HII regions lie beyond the range of optical detection, at distances exceeding several kpc; they thus provide a comprehensive coverage of the southern HII regions in the Galaxy over the longitude range 210 to 360^o and consistute a vital data base for the study of galactic structure. ... C Caswell (1972) . ... In column 16, "V", or a specific nebula name, denotes the presence of a visible optical counterpart, and "A" indicates the absence of an optical counterpart. ...

The Arecibo telescope is a versatile instrument with multiple receivers, backend processors, and telescope scanning modes. ... Observing modes are implemented at Arecibo through the Control Interface Module for Arecibo (CIMA). ... In this case, the observer is encouraged to submit a proposal for a new observing mode. ... Proposals for new observing modes will be evaluated by a technical review panel consisting of Arecibo technical and scientific staff. ... Flow chart. ...

The CHIANTI database consists of 4 primary ASCII files for each ion in the database. contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies. References: %Observed energy levels (2): Feldman, U., Curdt, W., Landi, E., Wilhelm, K., 2000, ApJ, 544, 508 %Observed energy levels (3,4,5): Sandlin, G.D., Bruekner, G.E., Scherrer, V.E., Tousey, R., 1976, ApJ, 205, L47 %Observed energy levels (6 to 15): Fuhr, J.R., et al., ...

ATMoB "Open Cluster Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Open Clusters Observing Awards program. Introduction: This awards program is oriented towards visually observing open clusters above magnitude 9.9. ... It turns out that a very unprejudiced and convenient method to dermine the limiting magnitude is to count the number of visible stars in certain areas on the sky. ...

... Data of obs. ... Reduced (Paper I) . NGC 0023 . VIII.1998 . ... NGC 0132 . ... Reduced . NGC 0157 . ... NGC 0615 . ... NGC 0753 . ... NGC 0945 . ... Bad data (clouds); . NGC 0972 . ... II.1998 . ... NGC 1024 . ... NGC 1058 . ... NGC 1073 . ... NGC 1084 . ... NGC 1134 . ... NGC 1637 . ... NGC 2276 . ... NGC 2608 . ... NGC 2964 . ... NGC 3184 . ... Bad data (low S/N) . NGC 3338 . ... Bad data (IFP failure) . NGC 3344 . ... Reduced (bad data) . ... Back to Project Vortex. ...

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 13 - 19.04.2015, Forecast on 20 - 27.04.2015, Carrington RotationÛ 2162, 2163 (27,93.03; 24,21.04.2015) SUNSPOT-FORMING ACTIVITY OF THE SUN WAS AT THE AVERAGE LEVEL ALL DAYS. ... SUNSPOT-FORMING ACTIVITY IS EXPECTED TO BE AT AVERAGE TO LOW LE- VELS. ... BY DATA OF CORONOGRAPHS SOHO AND STEREO WERE OBSERVED > 32 CME FROM WHICH TWO WERE "HALO" TYPE, ONE - "PARTIAL HALO III" TYPE AND TWO - "PARTIAL HALO II" TYPE. ...

Observational data on solar activity is a basement for investigation of processes that take place on the Sun and interplanetary space, with data of long-term observations being of special importance. ... Subsection "Sunspot groups" is the catalogue of all sunspot groups that were observed in the given year. ... For every day of observation of the group the area of the group, the area of the largest spot (both areas - in millionths of solar hemisphere) and number of spots in the group are presented. ...

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Radio Images Page . ... Exposure uf . ... 5548 . ... Exposure uf Exposure time of unfiltered event file . Exposure f Exposure time of filtered event file . ... Spectrum for small region of diffuse emission. ... Event 2 FITS File . ... AUX file . ... Region . ... see fit detail page for more about the fit. see chandra spectrum page for region used. ... 2004 , ApJ, 611, 906 : Chandra observation of entire central region of W44 . ...

Space Radio Telescope . The space radio telescope antenna consists of a deployable parabolic reflector (10-m diameter) which is made of 27 carbon fiber petals and central solid portion (3 m in diameter). The radio telescope has focus to diameter ratio F/D=0.43 and overall RMS surface accuracy 0.7 mm. ... A concentric feed arrangement at prime focus will provide the possibility of observing at two frequencies or two circular polarizations simultaneously. ... Observing frequency (MHz) . ...

... Glxy SB(s)b pec : Non-Existent Glxy S? Glxy SB(rs)cd: Glxy SAB(rs)0: Mag Alias/Notes 14.4 ESO 403-15 MCG -6-47-11 VV 376 PGC 67192 14.2 ESO 403-16 MCG -6-47-12 PGC 67199 14.5 ESO 531-25 MCG -4-51-11 VV 800 IRAS 21407-2535 PGC 67248 13.3 ESO 403-27 MCG -6-47-14 PGC 67352 ESO 403-32 MCG -6-47-15 IRAS 21453-3511 PGC 67387 13 IC 5135 Glxy Sa pec sp Glxy E+ pec: Glxy Sab pec sp Glxy E pec: Glxy SB(s)bc pec: Glxy Sb Glxy SAB(rs)bc Glxy S(r)c:? ...

... The March 20 total solar eclipse was visible over the North Atlantic and Arctic Oceans. ... Solar eclipses are of interest for radio astronomy, as they make it possible to observe individual details on the solar disc (spots, filaments, flocculi, etc.) ... On March 20, 2015 the integrated observations of the solar eclipse were carried out at the RATAN-600 radio telescope at 70 wavelengths simultaneously in the range of 1.65cm to 10cm with the 1% frequency resolution. ...

... The Co­Addition Technique Applied to Images of Galaxy Cores W. W. Zeilinger Institut f˜ur Astronomie, University of Vienna, T˜urkenschanzstraúe 17, A­1180 Wien, Austria P. Crane, P. GrosbÜl and A. Renzini European Southern Observatory, Karl­Schwarzschild Straúe 2, D­85748 Garching, Germany Abstract. ... One may therefore take full advantage of the high resolution FOC images by co­adding them with (high signal­to­noise) ground­ based data. ... References Crane, P. et al. ...

Microsymposium 34, MS015, 2001 TO THE DISCOVERY OF THE "SOUTH POLE - AITKEN " BASIN. ... Head [2] and Spudis [1] suggested in their reviews that the existense of the structure identified later as the South Pole - Aitken baasin was first predicted on the basis of a relief analysis of the mountain ridges observed in the libration zone be Hartman and Kuiper [7], i.e. after the first images of the lunar far-side had been obtained. ... SOUTH POLE-AIKEN BASIN: V.I.Chikmachev et al. ...

... OOF . ALMA . ... OOF Index . Zernike Polys . GBT example . ... Observed data and analysis . The observed beam maps are shown in the first row of the table below. ... We show the best-fitting aperture and the best-fitting beams as the number of Zernike orders used for the fitting is increased. A sample OOF observed data set (top row) and the results of analysis with increasing number of Zernike polynomials used to parameterise the aperture. ... In-focus beam . ... Observed beams . ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... Ïëàíåòíàÿ ñèñòåìà ñ òðåìÿ ñâåðõçåìëÿìè (4.2, 6.9 è 9.2 ìàññû Çåìëè) (The HARPS search for southern extra-solar planets. ... A planetary system with 3 Super-Earths (4.2, 6.9, 9.2 Earth masses)) . ... arxiv:0806.0657 Ñïåêòðîñêîïè÷åñêîå ïîäòâåðæäåíèå ýêñòðåìàëüíî ñèëüíîé âñïûøêè çâåçäîîáðàçîâàíèÿ íà êðàñíîì ñìåùåíèè 4.547 (Spectroscopic Confirmation Of An Extreme Starburst At Redshift 4.547) . ... îáçîð arxiv:0806.0695 Ïåðñïåêòèâû èçó÷åíèÿ Àßà íà ALMA (Prospects for AGN studies with ALMA) . ...

... We compare our results with the GRANAT X-ray observations of the Galactic center (Churazov et al. ... It is instructive to compare our results for the Galactic center starburst with what might be expected for a continuous star formation, with the average rate characteristic for the whole Galaxy. For this continuous star formation model, we would expect to observe in the region of around the Galactic center about 10% of the total number of X-ray sources in the Galaxy. ...