Physical limit to variability timescale 1 1 2 The central engine can change its state in a time Rg /c Rg ­ Schwarzschild radius The faster blob catches up with the slower one at the distance Lin Lsh = c 2 2 Lin 1 v2 - v1 L in ~ R g 2 1 L sh The minimum apparent duration of the light burst (at = 0): Lsh Rg 2 2 c c Geometrical implications Instantaneous and synchronous (in the lab frame) release of energy by the sho ck results in ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil Le 27 ao†Ёt, Mars ne d†йtr†‡nera toujours pas la Lune . ... Le fait que la plan†иte Mars apparaisse plus grosse que la Lune dans le ciel nocturne est un canular d†йj†а d†йsamorc†й en d†йtail sur le site de Ciel et Espace dans un article du 18 ao†Ёt 2009 . ... Etat du ciel...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... The projected distance of VFTS 682 to the cluster R136 is 29 pc (for an assumed LMC distance of 50 kpc). ... VFTS 682 is located in an active star-forming region, at a projected distance of 29 pc from the young massive cluster R136 in the Tarantula Nebula of the Large Magellanic Cloud. ... Our aim is to obtain the stellar properties, such as its intrinsic luminosity, and to investigate the origin of VFTS 682. ...

Hoag's Object ============= hoag_aligned_avg_bsdf.fits A sum of 7 100-second exposures in g' with the RC24 telescope Constellation: Serpens Caput Right ascension: 15h 17m 14.4s Declination: +2 3 08 Redshift: 12,740 +/- 50 km/s Distance: 600 +/- 30 Mly (183 +/- 8 Mpc) Type: SA0(r) Apparent dimensions: (V) 0.28' x 0.28' Apparent magnitude: (V) 16.0 Notable features: Ring galaxy AKA: PGC 54559,[1] PRC D-51[1] Observer: Karen Collins Processing: John Kielkopf

This is a new popup window - close it when you are done . ... Apparent motion due to parallax . The two images in this animation were taken at exactly the same time (2010-Oct-08, 0600 UTC), one from the remotely controlled telescope in Cambridge, MA, and the other from the remotely controlled telescope in Arizona. You can see the difference in the comet's apparent position from the two locations due to parallax. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Proposal Identification No.: P2530 Date Received: 2009­Oct­01 11:22:34 Technical Page Proposal Type: Regular General Category: Pulsars Observation Category: Galactic Total Time Requested: 36 Hours Minimum Useful Time: 1 Proposal Title: Studying Apparent Faster­than­light Pulse Propagation at the HI Resonance Using PSR B1937+21 ABSTRACT: We propose observations to confirm the discovery of apparent faster­than­light pulse propagation first detected using the Arecibo radio telescope last year. ...

Hide Zen home . ... Google . ... Search google for Apparent magnitude of jupiter and you'll get Jupiter тАФ Apparent Magnitude: 1.6 to -2.94 According to http://www.answers.com/topic/jupiter - More sources €Ё . ... Better example: supernova type of sn 1987a SN 1987A тАФ Supernova Type: Type II-P (Unusual) According to http://en.wikipedia.org/wiki/SN_1987A . ... SiteMap Changes HowTo 2016-04-11 2016-04-10 Blog 2009-03-22 2009-03-21 2009-03-20 . ... Search: . Zen, 2003-2007 ...

The ESA/ESO Astronomy Exercise Series 2 . The Distance to Messier 100 as Determined by Cepheid Variable Stars . ... The small variations in distance to the individual Cepheid variable stars in the Cloud are negligible compared with the much larger distance to the SMC. ... In this way Cepheid variable stars can be used as one of the 'standard candles' in the Universe that act either as distance indicators themselves or can be used to calibrate (or set the zero point for) other distance indicators. ...

... Strewn throughout the universe are "trees" of hydrogen gas that absorb light from distant objects. ... Globular star cluster Palomar 13 has roamed the halo of our Milky Way Galaxy for the last 12 billion years. The apparently sparse cluster of stars just left of center in this composite color digital image, it is one of the smallest, faintest globular clusters known. ... The above pictured open cluster, M11, contains thousands of stars and is just over five thousand light years distant. ...

... Visibility of Small Solar-System Bodies . Asteroids) in 2009 : . ... Distance (AU) . ... Jan. 12, 2009 . ... 8.8 m . ... is at opposition on July 4, 2009 . ... Apparent . ... from Sun (AU) . ... is at opposition on September 21, 2009 . ... middle distance between Earth and Sun, equal 149.6 millions km. ... Mean Distance: . ... a configuration of the Sun, Earth and a planet in which the apparent geocentric longitude of the planet differs by 180 from the apparent geocentric longitude of the Sun. ...

Definitions of Magnitudes and Surface Brightness 1 The magnitude system 1.1 Apparent magnitude Astronomers are stuck with the antiquated old system of magnitudes and so a clear explanation of what this system is and how it relates to more sensible units is important. ... 1.2 Absolute magnitude Absolute magnitude is a logarithmic luminosity scale. ... One usually goes by the round about process of referring to the absolute magnitude of the sun. ... Magnitudes and surface brightness 6/6 ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Meade Instruments . ... LX850 Series . ... Coronado Accessories . ... Dealer Locator . ... Series 5000 Mega Wide Angle Eyepieces . ... The 100 degree apparent field of view MWA eyepieces currently are Meade s widest angle eyepiece. ... Mega Wide Angle Series 5000 Eyepieces use between 7 and 9 optical elements to achieve a high contrast image with razor sharp correction all the way to the edge of their huge 100 degree apparent field of view. ...

... In the US and in other mid-latitude countries north of the equator (e.g those of Europe), the sun's daily trip (as it appears to us) is an arc across the southern sky. ... Moss avoids direct sunlight, and with the sun's path curving across the southern sky, the north side of a tree-trunk is the one most shaded. ... In addition, they are invariably tilted at an angle around 450, to make sure that the arrival of the sun's rays is as close to perpendicular as possible. ...

http :// hea-www.harvard.edu / AstroStat /slog/ 2007 / fits-to-ascii / Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders Fri, 01 Jun 2012 18:47:52 +0000 hourly 1 http ://wordpress.org/?v=3.4 http :// hea-www.harvard.edu / AstroStat /slog/ 2007 / fits-to-ascii /comment-page-1/#comment-7 vlk Wed, 31 Jan 2007 14:06:40 +0000 http :// hea-www.harvard.edu / ... It can be downloaded from http://gnudatalanguage.sourceforge.net/ . ...

VXD Quick Reference Rev B . ... Next DDB . Next DVT DDB . Dcb . ... Name . ... DCB . ... Physical DCB . ... Next DCB . ... Next Logical DCB . ... TSD flags . ... Demand Flags . ... Device Flags . ... Next DDB DCB . ... VSD Flags . ... Port Name . ... Next . ... Flags .. ... Name Ptr . ... 100 . Current Flags . ... TSD Flags . ... DCB_TSD_INVALID_PARTITION . ... DCB_TSD_USER_LETTERS_CHECKED . ... DCB_TSD_FIRST_USER_CHECK . ... DCB_TSD_USER_SET . ... 1 0000 . ... 100 0000 . ... Callback . ...

... BigStarCatalogExtension::StarWrapper< Star > Class Template Reference . StarWrapper (const SpecialZoneArray < Star > *a, const SpecialZoneData < Star > *z, const Star *s) . ... getJ2000EquatorialPos (const StelCore *core) const . ... getVMagnitude (const StelCore *core, bool withExtinction=false) const . ... getSelectPriority (const StelCore *core) const . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getEquinoxEquatorialPos (const StelCore *core) const . ...

The term Virtual Host refers to the practice of maintaining more than one server on one machine, as differentiated by their apparent hostname. ... Apache was one of the first servers to support IP-based virtual hosts right out of the box. ... Below is a list of documentation pages which explain all details of virtual host support in Apache version 1.3 and later. ... IP-based Virtual Hosts . ... Folks trying to debug their virtual host configuration may find the Apache -S command line switch useful. ...

COPRATES CHASMA NORTH WALL INTERIOR LAYERED DEPOSIT: LAYER MEASUREMENTS AND COMPARISON WITH JUVENTAE CHASMA ILDS USING MARS EXPRESS HIGH RESOLUTION STEREO CAMERA (HRSC) DERIVED TOPOGRAPHY Michael, G.1, E. Hauber1, K. Gwinner1, R. Stesky2 ... Planets, Freie Universitaet, Berlin, Germany 5ESTEC, ESA, Noordwijk, The Netherlands Introduction: The interior layered deposit ( ILD ) in the north wall of Coprates ... The lesser section of the ILD is confined by a ridge of the chasma wall. ...

Next: Preface Up: Contents Previous: Contents . Cover Illustration: Two B- band images of the Phoenix dwarf galaxy at different epochs ( top ), and the difference of the two using new software to register and scale the images ( bottom left ) and to match their PSFs ( bottom right ). In the fully matched case about a dozen Cepheid variables are readily apparent, as is one high proper-motion star just below and left of center. ...

... The Second International Astronomy Olympiad . ... Problems to solve, 8-10 Form Text of these problems is available in Russian too. ... Two stars have the same absolute magnitude. ... The orbital period of Mars is 687 days. ... See problem 2. for 8-10 Form. ... Problem to solve, 9-12 Form Text of the problem is available in Russian too. ... Problem is about Doppler-effect, to find velosities of two stars using their spectra and spectrum of our Sun, to estimate speed of the Earth moving around the Sun...