... A lightweight stick with two balls of equal weight at its end obviously has its CG in the middle. When one ball is twice the weight of the other, the CG divides the distance between them by a ratio 1:2, in a way that makes it closer to the heavier mass ( see figure ). ... Even though the balls are separate, one can speak of their common center of gravity, on the line connecting their centers, 1/3 of the distance from the center of the heavier ball. ...

. QSO - Quasi Stellar Object, also Quasar: QSOs are star like objects with very large redshifts (i.e. the light they emit is strongly displaced toward the red end of the spectrum). Although their exact nature is controversial, they are commonly considered to be extremely distant, unusually bright nuclei of galaxies. If so, then the light we see from them would have been emitted when the universe was a fraction of its present age.

... This is usually defined as the direction pointing toward the center of the primary body. ... NODE: The place where the plane of one orbit crosses the plane of another. ... ORBITAL PLANE: The flat surface that would result if every point on the orbit of a body was connected to the center of its primary. ... PENUMBRA: The edge of the primary body's shadow. ... PERIOD : The time required for one body to orbit the primary body. ... PROBE: A vessel designed to pass and observe an astronomical object. ...

Next: C Standard Library Functions Up: Common C Compiler Options Previous: Common C Compiler Options . c Suppress linking with ld(1) and produce a .o file for each source file. A single object file can be named explicitly using the -o option. ... Sends the output to the standard output, or to a file named with the -o option. Includes the cpp line numbering information. ... When this option is given, the -O and -R options are suppressed. -help Display helpful information about compiler. ...

... It provides for logging of the requests made to the server using the Common Logfile Format. This module has been replaced by mod_log_config in Apache 1.2 The log file contains a separate line for each request. A line is composed of several tokens separated by spaces: host ident authuser date request status bytes If a token does not have a value then it is represented by a hyphen (-). ... day = 2*digit . ... TransferLog . ... Context: server config, virtual host . ... Module: mod_log_common . ...

... Searching for Far Out and Wandering Worlds . ... solar system . ... Observe the Solar System . ... Tune into the Asteroid Day press conference . ... Tour the Solar System . ... т??Trojanт?? asteroids in far reaches of solar system more common than previously thought . ... ASTEROIDS . ... Astronomers considered Trojans presence at Uranus unlikely because they thought the gravitational pull of larger neighboring planets would destabilize and expel any uranian Trojans over the age of the solar system. ...

... Supernova explosion   in a binary is treated as an instantaneous mass loss of the exploding star. ... In this case, the eccentricity and semi-major axis of the binary after the explosion can be straightforwardly calculated (Boersma, 1961[ 21 ]). ... Then, the transition to a new system barycenter frame is made (at this point the spatial velocity of the new center of mass of the binary is computed), . ... During the CE stage, an effective spiral-in   of the binary components occurs. ...

... Gallery . ... Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: The Common Room from the courtyard . Description: NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. ... The Common Room from the courtyard NOTE: All images and movies are copyright and must not be reproduced or mirrored in any form without written permission. Powered by Gallery 3.0.9 (Chartres) . ...

... astro-ph . ... We present the goals and preliminary results of an unbiased, near-infrared, narrow-band imaging survey of the First Galactic Quadrant (10deg<l<65deg ; -1.3deg<b<+1.3deg). ... We publish 16 Doppler imaging temperature maps for the years 1994-2002 of the active RS CVn star II Peg. ... Through Doppler imaging we want to study the spot evolution of the star and in particular compare this with previous results showing a cyclic spot behaviour and persistent active longitudes. ...

Underdetermined sets is a new type of data structures (terms) developed in Actor Prolog . ... The point is that an underdetermined set can include some indefinite rest (a tail) like a list in usual Prolog . At the same time, the order of elements of an underdetermined set can be arbitrary one and it does not affect results of unification of underdetermined sets. Moreover, Actor Prolog guarantees that a rest of an underdetermined set never contains elements that are explicitly given in the set. ...

... IC443 is thought to have been formed between 30,000 and 35,000 years ago, and most likely is the remains of the pulsar, G189.6+3.3. Located about 5,000 light years away, the pulsar’s X-ray emissions excite the material of the nebula, causing the chemical components to emit light in their characteristic wavelengths. ... TAK FSQ . ... FSQ: 12x30 minute subs plus 14x5 minute subs, totaling 7 hours, 20 minutes . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Bojan Nikolic web pages home . Next: Phase Correction for ALMA with 183 GHz.. ... Finding the URL for download of the ALMA Common Software (ACS) sources can be a bit tricky so for my own and maybe other peoples future reference the current URL to use is: ftp://ftp.eso.org/projects/acs/public/Releases/ . Please enable JavaScript to view the comments powered by Disqus. blog comments powered by Disqus . Copyright 2012, Bojan Nikolic feedback welcome ...

The radius of the event horizon of a black hole with the mass of the Sun would be about 3 kilometers, about the same size as your city, town or village. If the Earth could be compressed into a black hole, the radius of its event horizon would be 1/330,000 of this, because the mass of the Earth is 1/330,000 times the mass of the Sun. ... 30,000,000 . ... 20,000 . ... Black hole event horizon . ... MYTH: All stars collapse to become black holes upon their death. ... MYTH: Black holes are very dense. ...

... The described algorithm is suitable for measurements of complex images of stars. ... a) the zero-based number of stars in the complex (multicentric) image, . b) set of preliminary coordinates - x i , y i , for all stars, index i is number of a star, . ... i - index of a star in the complex image; . ... These parameters are calculated by a nonlinear method of a least squares.The main output parameters of this algorithm are x i , y i ; where the index i is number of a star in the multicentric image. ...

. Album : asv-album :: Travels to distant places and countries :: 1998/05 Boston (USA) :: 1 Boston streets . Up . << Prev . View on John Hancock Tower from Boston Commons . Next >> . Album created by album script from Dave 's MarginalHacks on Tue Jun 23 14:46:36 2015 .

. Common photo of participants, by I.Salnikov, click to enlarge, 523 kB . Dr. Michael G. Gavrilov, Founding Chairman of the International Astronomy Olympiad, . ISSP of Russ. Acad. Sci., Academician Ossipyan street 2, 142432 Chernogolovka, Moscow region, Russia. URL: http://www.issp.ac.ru/iao/2011/ . e-mail: gavrilov@issp.ac.ru . fax: + 7-(496-52)-28-160 . Updated 06.10.2011.

... The condition of rectilinearity of orbit is: r\Theta — r = 0; (1) where r = eae \Gamma R; (2) — r = — eae + e — ae \Gamma — R; (3) S --- the center of attraction, E --- location of observer, P --- the observated object, e --- unit vector of direction to object, R --- vector of center of attraction location with respect to observer, r --- vector of object location with respect to the center of attraction, 115 ae --- distance between observer and object. ...

... Sun . ... Our Galaxy . ... Stars . ... Artist's impression of the red dwarf star CHRX 73 A and its companion object CHRX 73 B. The companion object is around 12 Jupiter masses, and may either be a planet or a brown dwarf. ... In Astronomy-speak, red dwarfs are low-mass stars; our own Sun is 2.5 times as heavy as even the biggest red dwarf. ... In our galaxy, the Milky Way, red dwarfs are the most common type of star . ... Tweets that mention Red dwarfs: The most important stars in the Universe | ...

... Bad Astronomy . ... Mad Science . ... if hubble was pointed at earth, what could it resolve? is it too bright? ... This type of image is called a ``flat field'', because you want the field of view to look as flat as possible. In space there aren't any flat fields you can use, but we do have one right here: the Earth. ... It takes a lot of sophisticated computer processing to turn this into a real flat field for Hubble to use, but luckily there are a lot of smart people working on the problem. ...

... StarMgr Class Reference . ... Get the current color used to label bright stars. ... Get Epoch for maximum light for a variable star with a specified Hipparcos catalogue number. static int StarMgr::getGcvsMagnitudeFlag . ... Get the magnitude flag code for a variable star with a specified Hipparcos catalogue number. static float StarMgr::getGcvsMaxMagnitude . ... Get the minimum magnitude or amplitude for a variable star with a specified Hipparcos catalogue number. static int StarMgr::getGcvsMM . ...