On' failures in the NIRSpec MEMS ST-ECF Instrument Science Report NGST 2002-02 The effects of `on' failures in a MEMS array for the NGST NIRSpec Santiago Arribas, Robert Fosbury Peter Jakobsen --1-- ST-ECF Instrument Science Report NGST 2002-02 The effects of `on' failures in a MEMS array for the NGST ... Assuming that the spectrum of a single facet uses 2000 detector pixels, only 0.01% of `on' failures is acceptable (i.e., 400 facets in a 2k в 2K MEMS array). ...

Galactic coordinate system based on multi-wavelength catalogues Ping-Jie Ding, Jia-Cheng Liu, and Zi Zhu School of Astronomy and Space Science, Nanjing University, China Outline Introduction: why we need to establish a new Galactic Coordinate System ( GalCS ) Data and methods used to find a proper GalCS Results and conclusion Discussion 2 Introduction: why we need to establish a new GalCS The Galactic coordinate ... 3 The GalCS is defined by three parameters p , p and . ...

... For the first balloon flight of the Nuclear Compton Telescope (NCT) we have simultaneously reduced lowenergy background and enabled hard X-ray imaging by enshrouding the top of the instrument in a tin shield (bottom had BGO shielding), with part of the shield having strategically placed holes -- a 10% open coded aperture mask working up to 80 keV in conjunction with the finely pixellated double-sided Ge strip detectors. ... Key words: Compton telescope, coded mask, hard X-ray imaging, NCT. ...

... Gallery . ... Home Astro-Imaging Page 3 . ... Lecture Series 2014-2015 . ... Clear Sky Chart . This Month's Sky . ... This Month's Sky - 2015 . This Month's Sky - January 2015 . This Month's Sky - February 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Students Life . ... February 14, 2014 . ... According to the Webometrics Ranking of World Universities that comes out twice a year, V. N. Karazin Kharkiv National University holds the third position among over 300 Ukrainian higher educational institutions and the 1,705 th position among almost 22,000 universities of the world. ... Statement of the Academic Board of V. N. Karazin Kharkiv National University as to Situation in Ukraine . ... Copyright 2010 V.љN. Karazin Kharkiv National University. ...

... Некоторые чудеса, связанные с фосфором и свинцом . ... История фосфора . ... Это светится белый фосфор. ... Белый фосфор - твердое кристаллическое вещество, причем в химически чистом виде кристаллы белого фосфора совершенно бесцветны, прозрачны и очень хорошо преломляют свет. ... Поэтому в обычных условиях фосфор внешне очень похож на воск, но тяжелее его (плотность белого фосфора 1,84). ... При 44њ С белый фосфор плавится, а при 280,5њ С кипит. ... Растворяли белый фосфор в бензоле или сероуглероде...

M obile A stronomical Sy stem of TE lescope- R obots MASTER-II Kislovodsk Lomonosov Moscow State University, Sternberg Astronomical Institute , Moscow Union "Optic" , Kislovodsk Solar Station Latitude = 43 o љ44'.767љN; Longitude = 42 o љ31'.417љE; Altitude = 2067љm MASTERљIIљ(8љsquareљdegress) + MASTERљVWF(VeryљWideљFieldљCameras (FOV=800 square degrees, Timeљresolutionљupљtoљ150љms, with unfiltered m_lim=14m on 5 sec. exposure, and ~10.5m with 0.15 sec) . ... 11h 38m 38.0s , -09d 59m 59s) . ...

... Bad Astronomy . ... On Thursday, February 15th 2001 (and replayed on March 19), the Fox TV network aired a program called ``Conspiracy Theory: Did We Land on the Moon?'', hosted by X-Files actor Mitch Pileggi. ... Dust around the lander . ... However, it appeals to our common sense: when the sky is black here on Earth, we see stars. ... Bad: The program claims that when the top half of the lander took off from the Moon to bring the astronauts back into orbit, there was no flame from the rocket. ...

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...

Core vehicle of the OS was launched on February 20, 1986 from the launching pad Baikonur by the launch vehicle Proton-K. It is the central binding element of the complex. The mass of the vehicle at launch was equal to 21000 kg; fuel mass- 1200kg. It has two main solar batteries' panels with area equal to 2*38 m 2 (capacity -9 kW) and additional panel fixed by the cosmonauts. ... Module has 6 docking ports (2 axial and 4 outlying) to dock the transportation ships and additional modules. ...

Abstract -- Abundances of heavy elements decreases with increasing galactocentric distance almost in all disk galaxies. ... To explain this gradient in young objects and in the interstellar gas one has to assume that a typical disk galaxy is an open system, i.e. it expels some synthesized heavy elements into the circumgalactic space and/or accretes intergalactic gas with zero metallicity, with rates of both processes depending on the galactocentric distance. ...

... Department Number . ... Astro Space Center . ... Telephone Number . 7(095) 333 3366 . FAX Number . 7(095) 333 2378 . ... stern@lukash.asc.rssi.ru . ...

... Астрофотография (Модераторы: LifeIsGood , MaxMan ) > . C/2009 P1 и другие кометы . ... 08 Июнь 2011, 22:18:47 ? ... Perihelion distance 1.5505340 AU . ... Inclination of orbit 106.1777000 degrees . Argument of perihelion 90.7453000 degrees . ... Date of perihelion JD 2455919.16800 (23 Dec 2011 16:01:55) . Right ascension: 22h59m39.520s . Declination: -02 40' 04.34" . Mean position at current epoch: . Right ascension: 23h00m14.863s . ... Right ascension: 23h00m15.962s . ...