... self-absorption - the absorption of light shining on an object by a process similar to that which produced the light originally; if a cloud emits less light than it absorbs from other clouds behind it, this net loss of light, termed self-absorption , causes the foreground cloud to appear darker than the background field (the term is from spectroscopy, where small absorption dips sometimes occur in larger emission lines, making the latter look as if it is absorbing part of itself) . ... HISA Main ...

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... The Sun is the source of most of the energy on Earth--the power source for plants, the cause of flows of atmosphere and of water, the source of the warmth which makes life possible. ... Atoms were found to consist of heavy nuclei, consisting of electrically positive protons and uncharged neutrons, while around the nuclei swarmed lightweight electrons, with a negative electric charge. ... All that suggested a different kind of force, a nuclear force, was holding nuclei together. ...

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Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The S un Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic ... Low mass stars live and die differently than high mass stars. ...

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• http://www.aaa.org/s932/images/09fallclass2.pdf

... For example, precision of the approximation was calculated for Solar system and 47 Uma star system Kepler orbital elements : Jupiter Saturn 9.537 0.0539 Uranus 19.189 0.0473 Neptune 30.070 0.0086 47 Uma b 2.10 0.032 0.10 3.76 5.83 0.89 47 Uma c 3.60 0 ... rad , rad , rad l, rad 0.0228 1.754 4.801 0.328 0.0434 1.983 5.865 5.591 0.0135 1.291 1.685 2.495 0.0309 2.300 4.636 4.673 Kepler elements for Solar ... Estimation accuracy of disturbing function (h1) expansion is presented. ...

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... Stars . ... To understand what has happened we need to consider an often-overlooked class of object, the white dwarfs. New research shows that some old stars known as white dwarfs might be held up by their rapid spins, and when they slow down, they explode as Type Ia supernovae. ... However, give a white dwarf a very close companion star and you could have an explosion visible across the Universe. ... This, however, is not the only catastrophe that can befall such a white dwarf star. ...

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... Posts tagged ?massive data? ... Tags: bimodality , chi-square minimization , Classification , CMD , Estimation , machine learning , massive data , model based , PCA , spectral analysis , spectroscopic , survey , VO . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

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... a positive central nucleus , where most of the atom's mass is concentrated, and . one or more negative electrons . Nucleus and electrons are held together by the electric attraction between positive (+) and negative (-) charges. ... When such processes occur in air, they produce there free ions and electrons, which can move and carry an electric current, something neutral atoms cannot do. ... The next heavier atom is that of helium (chemical symbol He) and it contains two electrons. ...

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... Forum . ... Recent Topics . ... MAO main . ... Fw: Actions directed to stop Russian aggression against Ukraine . ... Subject: Re: Actions directed to stop Russian aggression against Ukraine . ... Actions directed to stop Russian aggression against Ukraine" and I hope . ... around Ukraine is very dangerous indeed and who thinks that together we . ... Board Categories MAO main - Info - MAO - news - Flame Technical - Technical Support(Forum)(пўпµя…пїпѕпґпґпµяЂп¶пєп°(п¤пѕяЂяѓпј)) . ... MAO NASU . ...

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... A dynamical system is an action of the infinite cyclic group. Group action study is€аimportant for€аdifferent areas of€аdynamics and geometry. The topics of€аthe conference include: . ... Diophantine approximations and homogeneous flows, e.t.c. We plan a€аminicours by€аD.€аCalegari about the solution of€аthe Ahlfors' measure conjecture for limit sets of€аKleinian groups. ... In 5тАУ7€аminutes you'll see a€аchurch on€аyour right€атАФ turn right to€аBolshoy Vlasyevsky street after that. ...

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... GALAXY: A galaxy is made up of billions or trillions of stars bound together by their own gravity. ... HELIUM (He): The second element in the periodic table, has 2 protons, 2 neutrons, and is a noble gas. ... Helium melts at -272.2 degrees Celsius, and boils at -268.934 degrees Celsius. ... HYDROGEN (H): The first element on the periodic table, is a gas, and has an atomic mass of 1.00794 amu. ... Hydrogen melts at -259.34 degrees Celsius, and freezes at -252.87 degrees Celsius. ...

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... The event, a Type II supernova explosion, would have briefly dominated the night sky on Earth. ... Popularly known as the Veil Nebula, NGC 6960, NGC 6992, and NGC 6995 together constitute the corpse of a single supergiant star that perished in that supernova explosion. ... Such stars age about 1,000 times faster than does our Sun. ... Each nuclear-fusion stage releases energy and helps the star fight the ever-present pull of gravity. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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Annu. ... Key Words stellar energy production, Nobel Prize, supernova, binary pairs s Abstract Astrophysics has been an important part of my personal and scientific life three times. ... Gamov suggested to one of his graduate students, Charles Critchfield, that he actually calculate the proton-proton reaction. ... In stars, the proton-proton reaction is usually followed by a chain of reactions with the end result of producing 4He. ... In 1938, they suggested energy production in stars. ...

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FEATURES OF RSC ENERGIA'S MARTIAN MISSION CONCEPT . ... for the interplanetary . ... Then, using propulsion units, this vehicle is injected into the interplanetary trajectory, and over the next few months the vehicle transits to Mars. ... A special lander separates from the main section of the vehicle to take to the Martian surface the mission crew or a part of the crew. ... Key data on the interplanetary vehicle of the RSC Energia concept . ... Official WEB-site of S.P.Korolev RSC Energia . ...

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... We present a pro ject of an Information system on binary stars (ISBS). ... Stars from the following catalogues will be included in the first version of ISBS: Catalog of orbital elements , masses and luminosities of close double stars ( Svechnikov Bessonova 1984); The catalogue of approximate photometric and absolute elements of eclipsing variable stars ( Svechnikov Kuznetsova 1990); The catalogue of orbital elements , masses and luminosities of detached main-sequence ...

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Neptune is the coldness kingdom. ... Mass . ... The period of rotation . ... The average distance from the Sun . ... Excentricity of the orbit . ... Neptune is the eighth from the Sun great planet. ... From all the elements in Neptune the main are hydrogen and helium in such ratio(approximately) as in the Sun in one helium atom falls 20 atoms of hydrogen. ... According to the theoretical data there is a cloak and a core in Neptune. The core mass may by 90% of the entire planet’s mass. ...

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... Contacts . 2008: . Detection of two new LBV stars. In two exterior galaxies new luminous blue variable stars (LBV) were observed. ... Fast deceleration of rotation of a magnetic star with a strong field HD 37776. 31 years of observations of the magnetic star HD 37776 resulted in detecting deceleration of its axial rotation for 17.7 0.7s (dP/P = 4.0x10 -6 per year). ... It is the first case of magnetic deceleration detection for a chemically peculiar star on the main sequence. ... Archive . ...

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