This menu contains items that illustrate and explain some of the basic concepts that are represented by any operating system and by UNIX in particular. It helps you to understand why UNIX behaves in the way that it does. ... what an operating system is . the structure of the UNIX operating system . about commands and processes . the UNIX file system . ... Understanding these concepts you will help you make better use of UNIX and have a clearer idea about what it is you are doing. ...

ST ScI Preprint #1367 . Authors: D. Calzetti I review the characteristics of high redshift galaxies, with particular attention to the effects of dust obscuration on the observed light. Galaxies at redshift z ~1 and at z 2 are discussed separately, as the accessible information for each redshift range are different. ... At higher redshifts, most of the available data cover the far-UV region only, representing a challenge for a careful assessment of the effects of dust in galaxies. ...

Since the light from galaxies represents the integrated contribution of its consitutient stars, then we can learn about stellar populations in galaxies by modelling their light by summing up individual stellar spectra for different kinds of stars. ... The data cover the wavelength range 3500 - 9000 angstroms. ... Retrieve Digital Stellar Spectra Click on the appropriate spectral type. ... Note that the designation V means main sequence, IV means subgiants, III means giants, I means supergiant. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... Clearing the library. Note the different flooтАж . Sidebar Left . Sidebar Top . ... Title: Clearing the library. Note the different floor levels. There were at least 4 different levels of underfloor in the library. Description: NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ... NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ...

... Date: 13 October 2009 00:06:23 GMT+01:00 . Subject: Lectures, €а Science Cafe, IYA @ WWT, Mercury, Venus, Saturn, etc . ... IYA PUBLIC ASTRONOMY EVENT AT CASTLE ESPIE, 17 October. €а . ... Public Lecture, Armagh:€а"Why Are We Here?", 8.00 pm Thursday 22 October 2009 . ... а€а For free tickets to this public lecture, please contact Aileen McKee at the Armagh Observatory; Tel: 028-3752-2928; Fax: 028-3752-7174; e-mail: ambn arm.ac.uk. 4.€а Mercury, Venus, Saturn . ...

... Fortranљ66 . ... Fixed form . ... Whole Fortranљ66 . ... Continuation line indicated in column 6 . ... Blank line as comment . ... Extension in Unix .f .f .f .f90 .f .f90 . Extension in DOS .FOR .FOR .FOR .F90 .FOR .F90 . ... This applies to both fixed form and free form source code. ... Fixed form of the source code is discouraged in Fortran 95! ... In UNIX there is no concept called extension, and the extensions are not specified in the Fortran standard, but in informal manufacturer standards. ...

... The material in "From Stargazers to Starships" meets several important requirements of the national standards. Pages cited below are from National Science Education Standards National Academy Press, Washington 1995. ... For example: the sections on astronomy not only describe calendars and sundials (including their construction), but also the astronomy of the ancient Greeks, including two different ways in which ancient Greeks estimated the distance to the Moon. ...

... Initially SAI Supernova Catalogue was presented in the form of filebased system. ... The current version of SAI Supernova Catalogue presents data on supernovae together with data on their parent galaxies. ... The main source of data for the galaxies was LEDA database. ... In some cases our data were compared with the ones from the Asiago Supernova Catalogue and from List of Supernovae at Harvard-Smithsonian Center for Astrophysics, but the compilation of our Catalogue is carried out independently. ...

... For example, so far as we know, every tiny proton is exactly the same, but every huge galaxy is different. The Seagull Nebula . ... This portrait of the cosmic bird covers a 1.6 degree wide swath across the plane of the Milky Way, near the direction of Sirius, alpha star of the constellation Canis Major. NGC 7293: The Helix Nebula . ... The Tadpoles of IC 410 . ... Three CubeSats Released . ... Galaxy NGC 474: Shells and Star Streams . ... What's happening to galaxy NGC 474? ... 2013 2014 . ...

... In combining the data, it is assumed that the low resolution image better represents the short spacing data, whereas the high resolution best represents the fine structure. ... Key: out The output image. ... Key: factor The flux calibration factor. ... In practise, the calibration may not be perfect, and an extra calibration factor will be required to align the flux scales. "factor" gives the factor to scale the low resolution image to put it on the same flux scale as the high resolution image. ...

Paolo Padovani , II Universit di Roma , Paolo Giommi , ASI, SDC and Fabrizio Fiore, ASI, SDC and Osservatorio Astronomico di Roma . Original Version: MNRAS, (1997), 284, 569 . Text copyright (c) 1997. ... We study the X-ray spectra of 114 flat-spectrum radio quasars (FSRQ) using the hardness ratios as given in the WGA catalogue of ROSAT sources. ... We find that FSRQ have a distribution of energy spectral indices ranging between 0 and 3 with a mean value alpha_x ~ 1. ... Figure 1 (13kb) . ...

home events . ... Other Workshops, Conferences and Events . ... NSTA conferences offer the latest in science content, teaching strategy, and research, all presented by science educators who want to enhance and expand their professional growth. ... 2012 National Conference . ... This event promises to be a standout event with panels, fireside chats, lightning talks, book signings, and ... an extended opportunity to schmooze with glitterati from the worlds of science and science-based entertainment. ...

... The 7 and 15 um observations of the Galaxy obtained by the ISOGAL program offer an unique possibility to investigate and separate the different populations of stars in the Galactic Plane, in particular to study the population of low flux density YSOs which could not be detected with IRAS. ... The criteria are applied to five ISOGAL fields centered at l~+45 deg and b~0 deg, covering a total area of 0.504 deg$^2$. ...

... This review presents the results of Scenario Machine computations aimed at the population synthesis of different types of binary stars in our Galaxy and another galaxies. They demonstrate the ability of this method to make an important gross analysis of the modern scenarios for binary evolution, as well as to give interesting qualitative and quantitative predictions which can be checked observationally. ... The future development of the method can be considered from two different points of view. ...

ARTIFICIAL CRYSTALS FOR JEWELRY: . SPHALERITE, ERITROZINCITE, STILLEIT . At present only natural and sometimes artificial crystals of sphalerite have wide application for jewelry. Meantime, crystals of eritrozincite and stilleit also have fine colours, large refractive index and may be applied as jewels. ... to grow the sphalerite crystals. to grow the eritrozincite crystals. to grow the stilleit crystals. ... Colourless or any tints of green. ... Cubic (sphalerite) . ... 2.4 . ...

... Research . ... Past and present projects and other research activities . ... These projects range from: the end-to-end systems modelling, design and commissioning of an optical to near-infra-red stellar coronagraph at the William Herschel Telescope, a European Space Agency design study into fold-out large aperture space telescopes, prototyping 'Smart' X-ray mirrors for next generation X-ray telescopes and R into future adaptive optics. ... OSCA - an Optimised Stellar Coronagraph for Adaptive optics ...

. Christmas History Traditions Carols Celebration in UK Celebration in USA яhristmas Menu .

... Every effort is made to bring together a first-class panel of speakers, which will both inform and challenge those present. ... Several of the large cabins at Hidden Hollow Camp will be designated as dorm type accommodations for single registrants. ... Motels: L & K Travelodge Motel (1-419-756-7600), Super 8 Motel (1-419-756- 8875), Amerihost (1-800-434-5800), and the Baymont Inn (1-419-774-0005), located at the intersection of I-71 and State Route 13 about 10 minutes from Hidden Hollow '00. ...

Next: Radial velocity of the Up: Optical spectrum of IRAS04296 Previous: Observations and spectra reduction . ... However, molecular emission features are only very rarely observed in the optical spectra of PPNe. ... On the other hand, it is well known that cometary nuclei spectra show prominent Swan band emission. In both spectra of IRAS04296 we have discovered strong emission in the (0;0) and (0;1) bands of the Swan system of the molecule. ... Now consider the case of IRAS04296. ...