... Sun . ... The problem is that a Big Bang would only create hydrogen and helium, the simplest and lightest elements. ... Hydrogen can be converted into other elements by thermonuclear fusion , the process that powers stars and keeps the Sun shining, so it has long been suggested that we were formed from elements made inside stars. Unfortunately, the only element produced by the Sun so far is helium --- largely irrelevant to the Earth --- and most of that is still trapped in the Solar core. ...

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• Stars Beyond Maturity

All stars derive their energy through the thermonuclear fusion of light elements in to heavy elements. High temperatures are required so that the mutual electrostatic repulsion of the protons in each fusing atomic nucleus is overcome. ... Elements with more protons in their nuclei require higher temperatures. ... This sequence is now shown in the animation below. ... First Step of the Proton-Proton Chain Narration . Second Step of the Proton-Proton Chain Narration . ...

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• Formation of the Elements

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . ... d) The Age of the Chemical Elements . ... Some isotopes (forms of the element with different numbers of neutrons in the nucleus) of these elements are radioactive; they change into other isotopes at a rate that can be measured accurately in the laboratory. ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

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• ASP: The Biggest Bang of Them All

. Present section of the package enables one to perform following actions: . — . To make selection out of the total number of elements in accordance with the conditions imposed on some element or on a variety of elements. — . to sort the set of elements in order of ascending or descending value of any element. — . to draw the histogram of element distribution for obtained selection. — . To construct dotty picture of minor planet distribution in two– or three–dimension space of elements.

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• ENGAMPLE
• EPHEMERIDIES OF MINOR PLANETS (EMP)

... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > Modules . ... This module provides for executing CGI scripts based on media type or request method. ... The Action directive lets you run CGI scripts whenever a file of a certain MIME content type is requested. ... Action action-type cgi-script [virtual] . ... Script method cgi-script . ... This directive adds an action, which will activate cgi-script when a file is requested using the method of method . ...

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• HTML Tag Reference
• Forms Examples

... Apache HTTP Server Version 2.2 . Apache > HTTP Server > Documentation > Version 2.2 > Modules . ... This module provides for executing CGI scripts based on media type or request method. ... The Action directive lets you run CGI scripts whenever a file of a certain MIME content type is requested. ... Action action-type cgi-script [virtual] . ... Script method cgi-script . ... This directive adds an action, which will activate cgi-script when a file is requested using the method of method . ...

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• The Planet Jupiter
• Client-Specific Features

On this page you can compute thermodynamics, opacity and nuclear reaction rates for conditions which exist inside the Sun. ... Logarithmic partial derivative dlogP/dlogT (hi_t) . Logarithmic partial derivative dlogP/dlogRHO (hi_rho) . Logarithmic partial derivative dlogP/dlogX (hi_x) . Logarithmic partial derivative dlogU/dlogT (ksi_t) . ... Input field size does not limit the amount of data entered; you can type or paste thousands of lines (10,000 lines tested with output size over 5MB). ...

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• Conformance: requirements and recommendations

... HD 82943: Planet Swallower . ... Stars like HD 82943 are main sequence G dwarf stars with temperatures and compositions similar to the Sun. ... A Cerro Tololo Sky . ... As a gorgeous full Moon rose above the eastern horizon on February 7, the Space Shuttle Atlantis streaked skyward towards an orbital rendezvous with the International Space Station. ... Last month, the crew of the Space Shuttle Endeavor delivered new Logistics Modules and installed the new Canadarm2 on the growing outpost. ...

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This example shows how to add cursor interaction to a Ggi plot window. ... The user is informed of the possibility of cursor interaction by the shape of the cursor: it now is a cross-hair instead of the default cursor. /* example4.c -XT */ #define NPTS 100 # include stddef.h # include math.h # include gipsyc.h # include cmain.h # include init.h # include finis.h # include userfio.h # include pgplot.h # ...

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• Graphical User Interface Example (3)
• Graphical User Interface Example (2)
• Pulsar Group Site/Page Actions

. Various stages of the merger of two neutron stars are shown in this simulation sequence; the images cover a period of about one-hundredth of a second. Once the stars collide, material is squeezed out between the stars and gets stripped off from tidal tails. In the material ejected, a multitude of nuclear reactions takes place, producing heavy elements. S. Goriely, A. Bauswein, and H.-T. Janka (MPA)

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• Bright planets meet at dusk | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Cosmic crashes forge gold | Astronomy.com

... 2001 May 18 . HD 82943: Planet Swallower . Credit G. Israelian and R. Rebolo ( IAC ), N. C. Santos and M. Mayor ( Geneva Obs. ... Explanation: Stars like HD 82943 are main sequence G dwarf stars with temperatures and compositions similar to the Sun . ... Researchers using a high resolution spectrograph at the European Southern Observatory's Kueyen telescope believe they have seen a clear signature of this contamination by identifying the isotope Lithium-6 in this sun-like star's spectrum . ...

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• APOD: May 9, 1996 - Supernova Remnant: Cooking Elements In The LMC
• APOD: 2001 October 26 - Elements in the Aftermath
• APOD: 2008 March 10 - Planets Align Over Australian Radio Telescope Array

OptInt PmWiki . ... Edit Page | ... Search : . ... MROI Delay Line Design Contract . ... MROI . ... Page Actions . Results of search for link=Site.PageActions : . ... 3 pages found out of 254 pages searched. ... To limit your search to a single group, enter the group name followed by a slash at the beginning of the search string (e.g., "PmWiki/" or "Site/"). ... apple pie . both 'apple' and 'pie' . ... apple' in the PmWiki group of pages . ... the phrase 'pmwiki/apple' in all groups of pages . ...

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• OptInt PmWiki : PmWiki / Site Page Actions
• OptInt PmWiki : PmWiki / Available Actions
• OptInt PmWiki : Available Actions

... The Sun is powered by nuclear fusion: hydrogen `burns' to form helium, releasing energy . ... At an age of ~10 billion years (slightly over twice its present age), the Sun will exhaust the fuel available in its core. ... Pressure overwhelms gravity, and over a period of a few hundred thousand years, the Sun evolves into a `red giant' . ... Red giants have lifetimes of less than 100 million years. The temperature in the red giant core increases to 100 million degrees . ... The Ring Nebula . ...

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• brown dwarfs - 3
• CSPICE Routines: OSCELT_C
• Recipes and the Queue GPI Data Pipeline 1.0 documentation

... Institutes of Chernogolovka . The largest of all the scientific institutions of the center is the Institute of Chemical Physics in Chernogolovka , where fundamental problems of chemical physics are studied: kinetics and mechanisms of chemical and biological processes; processes of combustion, explosion, and polymerization; and mechanisms of elementary reactions involving high energy particles. ... Developments and Technologies . ...

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• Astronomy: Olympiad of Scientific Centres: Institutes of Chernogolovka
• LPCBC: Abstract 3_1

... Using sl_array . Array information . ... Inline::SLang . Doug's Home Page . ... Since the support for arrays in S-Lang and Perl do not match, the conversion of array values between the two languages is not entirely seemless, as shown in the examples below. ... The third option is to use a Perl Array_Type object to store the data; the Array_Type class is part of Inline::SLang and is as inefficient as using an array reference but does retain knowledge about the array size and type. ...

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• Reading Quiz
• The AstroStat Slog Blog Archive Survival Analysis: A Primer

This module provides for executing CGI scripts based on media type or request method. ... Source File: mod_actions.c . ... Action . ... Syntax: Action action-type cgi-script . ... Examples: # Requests for files of a particular type: Action image/gif /cgi-bin/images.cgi # Files of a particular file extension AddHandler my-file-type .xyz Action my-file-type /cgi-bin/program.cgi . ... This directive adds an action, which will activate cgi-script when a file is requested using the method of method . ...

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• Apache's Handler Use
• Apache module mod_setenvif

... Development of Ideas of Structure and Evolution of Stars. Integral Features of Stars, Which Determine Their Structure, Direction and Rate of Evolutuion. ... Connection between Potential and Thermal Energy of Star. ... Structure of a Main Sequence Star. Features of Massive Stars Evolution on the Main Sequence. Internal Structure of the Sun. ... White Dwarfs, Their Features. ... Evolution from the Main Sequence of Massive Stars. ... Evolution of Small Mass Stars till White Dwarfs Sequence. ...

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• Introduction to Astronomy
• Spherical and Practical Astronomy

... Note you are not allowed to nest FORM elements! ... Forms are created by placing input fields within paragraphs, preformatted text, lists and tables. ... Notice the use of the NAME attribute to name each field : TITLE Sample Questionaire /TITLE H1 Sample Questionaire /H1 P Please fill out this questionaire: FORM METHOD=post ACTION= http://www.hal.com/sample P Your name : input name = name size= 48 P input name = male type =radio Male P input ...

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• The IMG (Image) Element
• Information Type Elements
• Comet Center of SAI

God Science Forum Message . Forums: . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... God and Science | ... Discover The Science Behind The "Wormwood Star Prophecy" . ... Scientific Scenario Of A Comet's Impact And The "Wormwood Star" Prophecy . ... The Wormwood prophecy cites a "great star, blazing like a torch". ... www.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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• Oh My Aching Chemistry Back! - an Astronomy Net Education Forum Message

Amanda Karakas One of the most important research fields in astrophysics is the study of the origin of the elements. ... Asymptotic Giant Blanch (AGB) Stars: For low and intermediate-mass stars (with initial masses between about 0.8 to 8 solar masses) the most important nucleosynthesis occurs when stars evolve off the main sequence to the giant branches. ... This indicates that these stars obtained their unusual abundances via mass transfer from a previous red giant star, that has long evolved away. ...

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• Atmospheres
• Planet Pictures