. -!> download . Left: Consequtive explosion of 20 supernovae during 30 Myr. Right: Single hypernova (GRB) explosion with the total energy equivalent to 20 supernovae. The simulation was performed using a 2D Eulerian hydro code. The animation was done using IDL. -!>

... a set of permissions associated with every file and directory that determine who can read it, write to it, or execute it. Only the owner of the file (or the super-user) can change these permissions. a mathematical term that refers to a number, character or word which changes the action of the command it is applied to. a standard code used for representing information on computer systems and networks. It uses the printing and non-printing characters that can be generated by the keyboard. ...

... A star was observed at different zenith distances during one night at the Engelgardt's Astronomical Observatory in the program of atmospheric extinction study at blue. ... The determination of the star's brightness was performed with the method of photon counting. ... Variable star. ... The brightness of the variable star was measured occasionally during the other nights, and moments of maximal values of brightness (15.59m) were received on nights 2­5, the 2nd table. ... JD 2452805. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Star Atlas . ... stars . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... How do astronomers determine the ages of stars? ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine ...

This course will deal with the issues of alternative energy sources and sustainable energy sources. ... We will therefore make heavy use of network resources (e.g. the Internet) for providing documentation and guides to various forms of sustainable energy technology. ... All assignments will be posted there as well. ... The course will start out covering solar energy but will then move to other alternative energy sources such as, Wind, Tides, Hydroelectric, Ocean Currents, and Geothermal. ...

... These are plugged into plug-plate holes drilled at the predicted locations of suitable guide stars in the field of view. ... In particular, any departure from the ideal elastic curve from the tubing anchor point to the hole appears to affect the rotation angle of the plug. ... No structure of the residual plug angle appeared significant when these data were examined in 3-D. Figure 3: The plug rotation angle has a standard deviation of 54њ (201њ peak-valley). ... How large can the rotation error be? ...

Due to technical issues, on September 11, 1998 the radiolink was switched to 465 MHz channel. Data acquisition is presently performed only by SRC "PLANETA", Data Receiving Center in Obninsk and Western Siberia Data Receiving Center in Nobosibirsk . For conditions of obtaining data from RESURS-01 N3 please contact SRC "PLANETA". ... Registration of full data stream (61.44 Mbit/s) is performed only by Data Receiving Center, SRC "PLANETA", Obninsk. ...

... Class . ... SUMMARY: NESTED | FIELD | CONSTR | METHOD . DETAIL: FIELD | ... java.lang.Object ij.plugin.Selection . ... public class Selection . ... Field Summary . ... Method Summary . ... This method is called when the plugin is loaded. Methods inherited from class java.lang.Object . ... Constructor Detail public Selection () . ... This method is called when the plugin is loaded. 'arg', which may be blank, is the argument specified for this plugin in IJ_Props.txt. ...

... Space Contents 1-2 YEAR 3-4 MONTH 5-6 DAY 7-8 BLANK 9-12 N (THE NORTHERN HEMISPHERE aa DAILY VALUE ) 13-15 BLANK 16-19 S (THE SOUTHERN HEMISPHERE aa DAILY VALUE ) 20-22 BLANK 23-26 M1 (HALF DAILY VALUE OF aa INDICES FOR THE GREENWICH DAY ) 27-29 BLANK 30-33 M2 (SECOND HALF DAILY VALUE OF aa INDICES FOR GREENWICH DAY ) 34-36 BLANK 37-38 CC_OR_K (QUIET DAYS CLASSIFICATION) 39-41 MONTHLY MEAN DATA: Loacated after the last day of the month. ...

... 2 Measurement of PMTs counting characteristics and selection of op erating p oint To select the operating point of the PMT, that is the optimal values of the high voltage supply and pulse discrimination threshold, the command run counting=hv value is provided in the program mass. ... Starting with the minimum voltage (say 550 V) run command run counting=550 for the measurement execution. ... It is recommended to take measurements for the set of values of 0.4, 0.6, 0.8, 1.0. ...

An article on the base of oral presentation “Design and Implementation of the Teen-Age Message” at the 1 st International Workshop “THE ART AND SCIENCE OF INTERSTELLAR MESSAGE COMPOSITION”, March 18, 2002, Paris , France , http://publish.seti.org/art_science . ... A radio signal with constant frequency and so, with zero initial information content, uses the "language of nature" to report to Them some useful astrophysical data about the interstellar medium. ... Continuous Function . ...

... Based on the measurements of the Stokes parameters in the continuum and in the broad 0.6563 nm hydrogen emission line obtained with the 6-m telescope for the Seyfert galaxy Mkn 6, secular variability of the hydrogen line profile polarization was discovered; a time lag of less than 2 days between the continuum flux and the polarized continuum emission was determined which corresponds to the size of the region where the polarization of the continuum occurs, less than 0.001 pc. ...

Pulkovo NEO Page . ... NEA Accuracy Estimation . ... The estimation of accuracy of the current CCD observations of asteroids and comets is constantly performed at Pulkovo Observatory. ... The (O-C) values, so called "Observed" minus "Calculated" positions, characterize numerically the observations of any observatory, both professional and amateur, during a short period (one or several close nights). ... So the (O-C) values for these objects nearly entirely define the errors of observations. ...

... MAO main . ... The DRAGON globular cluster simulations: a million stars, black holes and gravitational waves . ... simulations of globular clusters with a million stars on the high-performance . ... of stars in globular clusters at unprecedented detail but also shed light into . the dark world of black holes. ... clusters of single and binary black holes. ... of a globular cluster. www.mpa-garching.mpg.de/328833/hl201603 . ... MAO/NASU, 27 Akademika Zabolotnoho St. 03680 Kyiv, Ukraine . ...

... VaST is a software tool for finding variable objects on a series of astronomical images. ... VaST performs object detection and aperture photometry using SExtractor on each image, cross-matches lists of detected stars, performs magnitude calibration with respect to the first (reference) image and constructs a lightcurve for each object. ... VaST FITS image viewer ./pgfv . ... Part I" PZP, vol. ... K. V. Sokolovsky, S. A. Korotkiy; "New Variable Stars Discovered by the NMW Survey" PZP, vol. ...