Astronomy Picture of the Day . ... The relative average abundance in our Solar System appears higher than can be made in the early universe, in stars, and even in typical supernova explosions. ... Comet Garradd and the Coat Hanger . ... Sweeping through planet Earth's night sky, last weekend Comet Garradd (C/2009 P1) visited this lovely star field along the Milky Way in the constellation Vulpecula. ... Stars born.. M6: The Butterfly Cluster . ... Comet Garradd Passes Ten Thousand Stars . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

The First Law (1): Energy is Conserved in a closed system: . ... We usually consider work and heat flow as the two kinds of energy . The Second Law (2): The Law of Entropy: . ... The amount of disorder increases . ... You can not go from a disordered system to an ordered system without inputting more energy (this is the most important attribute of the second law) . ... In no way can we recover work of that this disordered system without putting energy into the system. ... More on Thermodynamics . ...

... 2000 July 19 . Globular Cluster M19 . ... Explanation: M19 appears to be a typical globular cluster of stars - except for its shape. ... In fact, M19 is the most aspherical globular cluster of the approximately 160 known orbiting the center of our Milky Way Galaxy . M19 lies about 27,000 light-years away, measures about 60 light-years across, and is home to over 100,000 stars. The cluster can be found with binoculars towards the constellation of Ophiuchus . ... About APOD | ...

... The accuracy of calculation of both INTERBALL spacecraft (SC) motion has been estimated at the IKI. ... The 30 days measuring intervals were used during the Tail probe (TP) orbital data treatment, and 15 days intervals - during the Auroral probe (AP) orbit determination. ... http://www.iki.rssi.ru/vprokhor/indap.htm for the Auroral probe; . http://www.iki.rssi.ru/vprokhor/indtp.htm for the Tail probe . ... http://www.iki.rssi.ru/vprokhor/ssc.htm , or http://www.iki.rssi.ru/vprokhor/amisan.htm . ...

Astronomy Discussion Forums . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... New Model: How Do The Sun And Moon Appear To Move Across The Sky . ... Post Message | ... focused on the Sun and the Moon as they appear from the given location of the Earth surface: . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... SUBJECT: 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... which will be held in Beijing, P.R. China, from August 25-29, 2014, hosted by Chinese Academy of Sciences . ... China), . ... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. ...

... Character level elements are used to specify either the structural meaning or the physical appearence of marked text without causing a paragraph break. ... Highlighting elements are allowed within the content of other highlighting elements, but implementations are not required to render these nested highlighting elements distinctly from non-nested elements. ... An SGML identifier used as the target for hypertext links or for naming particular elements in associated style sheets. ... CLASS . ...

To construct frequency distribution (histogram) of minor planets according to value of some element/ parameter/ function user should first select Elements item in menu bar and then Histogram in drop-down menu. ... User has possibility to save histogram or to print it using standard means. To save the file select File item in menu bar and then Save As... in drop-down menu. ... To print histogram select File item in menu bar and then take advantage of options Print Preview , Print Setup , Print . ...

... Armagh Planetarium . ... Universe . ... Posted on October 1, 2010 | ... Before the modern era of technological astronomy, to know anything [ ] . Continue Reading.. ... 2 Comments In, say 1975, there was only one kind of ?stuff? in the Universe, matter made of protons and neutrons. ... Newer Entries . Hello, IтАЩm Colin, welcoming you to Astronotes, the PlanetariumтАЩs official blog. Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

... SGML . The text/html content type . In this section, we begin the specification of HTML 4.0, starting with the contract between authors, documents, users, and user agents. ... These recommendations are not normative and conformance with this specification does not depend on their realization. ... An HTML document is an SGML document that meets the constraints of this specification. ... A user is a person who interacts with a user agent to view, hear, or otherwise use a rendered HTML document. ...

The antenna element Ravi ATNF, Narrabri 1. ... Miriad works out the radio Parabolic reflector: A parabolic reflector adds all the fields from a surface = aperture at a focal point. ... Feeds are `compact' and `corrugated' horns The inner profile is curved The inner surface has grooves Cross-section of a horn Sub-reflector 28 main-reflector Feed horn O `optical axis' The feed horn adds all the rays that come from the 28 deg. wide sub-reflector. The feed down-weights rays that come off-axis. ...

... Bringing news from across the Universe to children all around the world . ... Yet, all of these things are made from the same stuff: chemical elements. ... In total, there are only 118 chemical elements. That means that everything in your room and everything that we can see on Earth is made up from different amounts of some of these chemical elements. ... There might be some extra chemical elements out there, but astronomers only know about 118 chemical elements so far. ...

... We address a question if globular clusters (GC) in a protogalaxy could for some time evolve chemically as isolated systems, enriching themselves with heavy elements produced in first supernova events that follow initial star formation. We determine both the critical mass of a protoglobular cluster that is needed to retain the ejecta of the very first supernova, and the critical energy (i.e., number of supernovae) that is needed to expel the residual gas from a cluster of a given mass. ...

... Research . ... I aim to understand the variety of processes that have driven galaxy formation and mass assembly across cosmological history via the resolved (star-by-star) study of nearby systems - in particular the Milky Way and Andromeda (especially their stellar halos and globular cluster populations), the Magellanic Clouds, and the myriad of smaller dwarfs that inhabit the "Local Group".б  . ... Globular clusters are fascinating objects in their own right. ...

Physicists have been honored by having their picture on currency in many countries around the world. ... Marie and Pierre Curie (Marie: 1867-1934, Pierre: 1859-1906) appear on the French 500 franc note. ... The greatest physicist of this century, Einstein not only invented the theories of special relativity (behavior of rapidly moving object) and general relativity (theory of gravitation), but made fundamental contributions to the beginnings of quantum theory. ... For a bio, click here . ... 100 K) . ...

... Abstract The function returns the ordinal position of any given item in a double precision set. ... Detailed_Input item is a double precision number to be located within a set. set is a double precision CSPICE set that is to be searched for the occurrence of item. set must be declared as a double precision SpiceCell. ... Particulars A natural ordering can be imposed upon the the elements of any CSPICE set, be it integer, character or double precision. ... Link to routine source . ...

... The overall globular cluster population is divided by gap in the metallicity function at [Fe/H]=-1.0 into two discrete groups with well-defined maxima at [Fe/H]=-1.60?0.03 dex, and -0.60?0.04 dex. ... Clusters with extremely blue horizontal branches occupy a spherical volume of radius ~ 9 kpc, have high rotational velocities ( V rot =77?33 km/s), have substantial and equal negative radial and vertical metallicity gradients, and are, on average, the oldest group (the old-halo subsystem). ...

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...