... Behemoth black hole found in an unlikely place . ... black holes . ... Observing springtime deep-sky objects with a large telescope . ... Could large numbers of black holes account for much of the "dark matter" estimated to exist in our universe? ... NASA, ESA, M.J. Jee and H. Ford (Johns Hopkins University) No, because the universe never had the raw material to grow enough black holes to account for current estimates of dark matter. Get instant access to subscriber content on Astronomy.com! ...

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

... Planets . ... The planets were found using the HARPS instrument on the 3.6m telescope at ESOтАЩs La Silla Observatory. ... A planet in orbit around a star causes the star to regularly move towards and away from observers on Earth. ... One newly discovered planet, HD 85512 b, is best hope found so far for a habitable exoplanet. ... The HARPS team so far have found that about 40% of stars similar to own Sun have at least one planet smaller than Saturn (which is 95 times more massive than Earth). ...

... Bojan Nikolic web pages (r. 329) . Out-Of-Focus (OOF) Holography . The observed beam maps are shown in the first row of the table below. ... The analysis was done in the usual way. ... A sample OOF observed data set (top row) and the results of analysis with increasing number of Zernike polynomials used to parameterise the aperture: . Observed beams . Example of an OOF analysis for the GBT . Observed data and analysis . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

... casa::Primes . ... Creates a reference table of prime numbers, and some functions. ... This function returns the closest integer larger than number from the table of primes. static uInt . ... If there is no entry in the table of primes which is larger than number, a zero is returned. static Block < uInt > casa::Primes::cachedPrimes . ... This function finds the next largest prime than number, returns that value and stores it in the table of primes. static uInt casa::Primes::smallestPrimeFactor . ...

... HST . ... The schedulability of an HST observation depends upon many factors and differs considerably between three-gyro and two-gyro operations. ... Figure 2.1: Sky Availability on 5 December 2005 . Caption: Sky availability for 5 December 2005 in both three-gyro mode (top panel) and two-gyro mode (bottom panel). ... The bottom panel of Figure 2.2 shows the number of days in a cycle that any position in the sky is observable with HST operating in two-gyro mode. ...

... Large Sunspot Group AR 9393 . ... Credit Copyright: MDI , SOHO , ESA , NASA Explanation: The largest sunspot group of the past ten years crossed the surface of the Sun late last month and early this month. The group was designated Active Region 9393 as it was the 9393rd region identified since counting officially began in 1973. ... Just after the end of the movie, on April 2, AR 9393 unleashed the largest solar flare of the last 25 years . ... Violent Sunspot Group AR 1302 Unleashes a Flare . ...

Next: An example of Up: Classification of Images Previous: Creation of the . The classification process (command CLASSIFY/IMAGE) tags each frame with one or more character strings supplied by the user that classify the image in a unique way and will be stored into columns of the OST. For instance scientific exposures observed in SUSI using the filter number 639 may be described` with the two strings ``SCI" and ``FILT_639". ... The command CLASSIFY/IMAGE ntt WFIB :OPATH FB&1 . ...

... ON THE ROLE OF LARGE-SCALE PLASMA IRREGULARITIES AT THE FINAL STAGE OF ANOMALOUS ABSOPTION DEVELOPING UNDER HF HEATING OF THE IONOSPHERE . ... Fig. ... With the aid of numerical statistical modeling based on multiple ray tracing it is shown that in presence of large-scale irregularities the reflected signal amplitude mean value is increased significantly. ... Dependence of the mean amplitude of the reflected from the ionosphere signal on the large-scale (10-50 km) electron density irregularity level...

N-BODY SIMULATIONS OF PLANET FORMATION: VARYING THE NUMBER OF PLANETARY EMBRYOS J.E. CHAMBERS Armagh Observatory, College Hill, Armagh, Northern Ireland, BT61 9DG, UK. ... These gained mass until they became large enough to gravitationally per- turb other objects in the nebula. ... Their simulations started with a few tens of planetary embryos, moving on circular nearly-coplanar orbits in the region now occupied by the terrestrial planets. ... Rev. Earth Planet. ... 4 J.E. CHAMBERS Figure 2. ...

... Number of Strips: This is the total number of strips to be covered for the map. The map size (in declination), is then (Number of strips 1) (Dec step) + (Beam size). If you wish to do a complete map, you must have (Number of strips) = 2 INT[(Dec Offset)/(Dec Step)+0.5] +1 . ... If you wish to do a complete map, you must have (Number of strips) = 2 INT[(Dec Offset)/(Dec Step)+0.5] +1 the declination of your first strip will be ([object Dec] + [Dec Offset]). ...

... The extraordinary solar activity of October--November 2003 manifested itself in many powerful eruptive events, including large CMEs and extremely powerful flares. ... We study large-scale post-eruptive activity manifestations on the Sun associated with CMEs, i.e., dimmings and coronal waves, observed in extreme ultraviolet with the EIT telescope on SOHO and SPIRIT telescope on the CORONAS-F satellite. ...

... Users . ... Data Collection and Analysis . ... This particular part of the analysis has been disabled since the code is struggling to cope with the number of users seen this year, in particular the large contingent of people who have re-tweeted NASA. ... Order accounts: by user number (effectively random) by number of tweets (includes retweets) by number of followers by number of followers that also tweeted about AAS225 by number of friends that also tweeted about AAS225 . ... by user number . ...

... The lava flow has visibly fewer impact craters than the background terrain, illustrating the general principle that crater numbers can reveal ages of surfaces. ... Dating Small Martian Features . ... The crater-counting system that scientists have used since the 1970s to determine the age of large geologic features on Mars will also allow them to date small features, such as riverbeds and lava flows, according to William K. Hartmann, a senior scientist at the Tucson-based Planetary Science Institute...

... In addition to the planets and their satellites the solar system contains a large number of smaller but interesting objects. There are thousands of known asteroids and comets and undoubtedly many more unknown ones. ... There are also some asteroids whose orbits carry them closer to the Sun than the Earth (Aten, Icarus, Hephaistos). Most comets have highly elliptical orbits which spend most of their time in the outer reaches of the solar system with only brief passages close to the Sun. ...

... In addition to the planets and their satellites the solar system contains a large number of smaller but interesting objects. T here are thousands of known asteroids and comets and undoubtedly many more unknown ones. ... There are also some asteroids whose orbits carry them closer to the Sun than the Earth (Aten, Icarus, Hephaistos). Most comets have highly elliptical orbits which spend most of their time in the outer reaches of the solar system with only brief passages close to the Sun. ...

... Visualization of such data has now become a complex 4-D data-mining problem, combining space and time, and finding interesting events in these large datasets. ... NEMO (Teuben 1994) and Starlab are traditional programming environments with which N-body simulations can be setup, run, and analyzed. ... By adding complete orbital information for a select number of stars we have started fully interactive data mining of our 4-D spacetime histories of these star cluster simulations runs. ...

When using a large number of Virtual Hosts, Apache may run out of available file descriptors (sometimes called file handles if each Virtual Host specifies different log files. ... Unix operating systems limit the number of file descriptors that may be used by a process; the limit is typically 64, and may usually be increased up to a large hard-limit. ... If you system falls into 1 or 2 (above), then increase the file descriptor limit before starting Apache, using a script like #!/bin/sh . ...

Product: Report of Solar-Geophysical Activity :Issued: 2016 Apr 08 2200 UTC # Prepared jointly by the U.S. Dept. of Commerce, NOAA, # Space Weather Prediction Center and the U.S. Air Force. ... Analysis of Solar Active Regions and Activity from 07/2100Z to 08/2100Z: Solar activity has been at low levels for the past 24 hours. ... Geophysical Activity Summary 07/2100Z to 08/2100Z: The geomagnetic field has been at quiet to minor storm levels for the past 24 hours. ...

... 332, P L25-L28 (1998). Abstract . ... 332, P 395-409 (1998). ... 332, P 410-428 (1998). ... 332, P 429-448 (1998). ... 332, P 449-458 (1998). ... 332, P 459-478 (1998). ... 332, P 479-492 (1998). ... 332, P 493-502 (1998). ... 332, P 503-513 (1998). ... 332, P 514-522 (1998). ... 332, P 523-525 (1998). ... 332, P 526-540 (1998). ... 332, P 541-560 (1998). ... 332, P 561-568 (1998). ... 332, P 569-574 (1998). ... 332, P 575-585 (1998). ... 332, P 586-604 (1998). ... helpdesk@link.springer.de ...