... Star Atlas . Product Reviews . ... stars . ... We are made up of elements forged in stars. But with the vast distances between stars, are we the product of only one star or many? ... RELATED TOPICS: STARS . Not only are you made of many stars; you re made of many generations of stars. ... Get instant access to subscriber content on Astronomy.com! Access our interactive Atlas of the Stars . ... A gamma-ray burst hints that LIGO's double black holes started as one massive star . ...

Chiaki Kobayashi, Ralph Sutherland How galaxies did form and evolution? - to answer this unsolved problem, we are simulating the formation and evolutionary history of galaxies in the Universe, including star formation, supernovae feedback, and chemical enrichment. Comparing the spacial distribution of elements within galaxies with observations, we will examine fundamental physical processes that drive galaxy formation. ... COALA : Universe Galaxy AGN Star Planet ...

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... 8, ``Celestial Mechanics'', 2002 Expansion of the Hamiltonian of the planetary three--body problem into Poisson series in all elements using Poisson series processor PSP E. D. Kuznetsov 1 , K. V. Kholshevnikov 2 , A. V. Greb 3 1 Astronomical Observatory of Urals State University, Ekaterinburg The first step to solve it involves expansion of the corresponding Hamiltonian into Poisson series in all elements. ... As to osculating elements we deal with two systems of them. ...

Ballistic life-time . ... The orbit inclination to the equatorial plane (black line) and to the ecliptic plane (red line) are shown on the third panel. ... The launch orbital elements value and its evolution during flight is shown on the plot for the time interval (August 3, 1995 - October 16 2000). ... The critical parameter is perigee altitude shown on the first panel. ... This parameter determine the IB_Tail ballistic lifetime up to October 16, 2000. ... Dated 25 May, 2000 . ... INTERBALL mission ...

Welcome to the Starburst and Galaxy Evolution website.

... The distributions of orbits eccenttricities and of angular momenta for the halo stars and the old disk population are considered. The distributions have gaps separating the halo from the disk and dividing the halo population into three groups. ... Рассмотрены распределения звезд гало и старого населения диска по величине эксцентриситета орбит и угового момента. Распределения имеют провалы, отделяющие гало от диска и делящие населения гало на три группы. ...

What happens to a star heavier than five solar masses? ... Stars about ten solar masses probably behave like our five solar mass star until they reach the end of core-helium burning. ... The Crab nebula was formed after a massive explosion ripped a star apart in 1054. ... Today, the glowing outer layers of the star are still rushing away from a tiny star in the centre. ... An incredible explosion rips through the outer layers of the star, releasing colossal amounts of energy in a supernova explosion. ...

Outer Natural Satellites Orbits Ephemerides. ... Choose type of the ephemeride: . ... Values of the orbital elements [ output e sin( ), e cos( ), sin(i) sin( ), sin(i) cos( ) ] . Distances between the osculating orbits . ... Choose Second Satellite (for the distances) N9 Halimede N10 Psamathe N11 Sao N12 Laomedeia N13 Neso . ... Enter initial date (years) . Enter final date (years) . ... inclination deg. pericenter deg. node deg. Enter upper limit of frequency deg/year . ...

... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Late Stages of Stellar Evolution . Welcome to the home page of the Late Stages of Stellar Evolution" We are a research group which operates within the Astrophysics Group of the Australia Telescope National Facility. ... To investigate the late stages of stellar evolution and in particular the role of stellar mass-loss in the evolution of asymptotic giant branch stars, proto-planetary nebulae and extremely massive stars. ...

... Inhomogeneous planetary nebulae: Carbon and Oxygen abundances, Astron. ... Abstract . text in English . ... text in Russian . ... Chemica evolution of the system of galactic planetary nebulae , Astrophysics, 45 , 451-463 (2002) . ... Evolution of Elemental Abundances in Planetary Nebulae, Astronomy Letters, 32 , 557-565 ( 2006 ) . ... text in Russian (0.23Mb) . ... He, C, N, and O Abundances in an Ensemble of Galactic Planetary Nebulae, Astronomy Letters, 35 , 518-533 ( 2009 ) . ...

Armed with these assumptions, observations, and laws, cosmologists try to build a theory of the development, or evolution, of the universe. ... Over the past 70 years, they have constructed and tested a theory that seems to explain the major properties of the universe: the Big Bang theory. ... This is an important point: The Big Bang theory allows for many different scenarios of the detailed evolution and composition of the universe. ... Because of a theory called nucleosynthesis. ...

Abstract -- Abundances of heavy elements decreases with increasing galactocentric distance almost in all disk galaxies. ... To explain this gradient in young objects and in the interstellar gas one has to assume that a typical disk galaxy is an open system, i.e. it expels some synthesized heavy elements into the circumgalactic space and/or accretes intergalactic gas with zero metallicity, with rates of both processes depending on the galactocentric distance. ...

... We present a new code for evolving three-dimensional self-gravitating collisionless systems with a large number of particles . FLY (Fast Level-based N-bodY code) is a fully parallel code based on a tree algorithm. ... FLY output data can be analysed with AstroMD, an analysis and visualization tool specifically designed for astrophysical data. ... During the tree walk procedure, FLY builds a single interaction list (IL) to be applied to all particles inside a grouping cell ( ). ...

Next: Supernova Explosions Up: No Title Previous: X-ray Luminosity Evolution . The origin of cosmic rays (CR) (especially of very high energies, >  eV) until now has been one of the unsolved problems in modern astrophysics. It is unclear as yet whether one universal mechanism of relativistic particle formation in our Galaxy operates or not, and if there are several different mechanisms, what is their relative contribution to CR formation. ... compact X-ray stars in binary systems. ...

... As you may know, I'm writing a book for Prentice-Hall, due in January, called Peer Instruction for Astronomy. ... I'm looking for a colleague or two willing to review/critique some of the ConcepTest questions that will be included in the book. See http://hea-www.harvard.edu/~pgreen/educ/ConcepTests.html I suspect that a significant contribution would only take you 2-3 hours. ... ConcepTests are multiple choice questions which the students pose to each other in small groups, during class. ...

... Science Users Information > Science Activities > Science in Garching > Research Area: STELLAR STRUCTURE AND EVOLUTION . ... Reset view all 3 per page 5 per page 10 per page Sort by Title A-Z Title Z-A Date asc Date desc Research Topics Planets and Star Formation Stellar Structure and Evolution Stellar Populations Cosmology and the Early Universe Scientific Positions Faculty Fellows Scientists Students . ... Planets and Star Formation Stellar Populations Stellar Structure and Evolution Faculty . ...

... The main field of our team interests is the researching of galaxy clusters as well as single nearby galaxies. The galaxies and galaxy clusters, being gravitationaly bound and reliably distinguishable systems, allow us to determine their global physical characteristics. At the same time they are integrated as elements into higher level spatial structures or systems. ... Вack to main homepage . ...

... Cavendish . ... Cavendish/ESO . ... Institute of Astro- and Particle Physics, University of Innsbruck, Austria . ... University of Cambridge . ... Institute for Astronomy . ... Astronomical Institute of the Ruhr-University Bochum . ... Cavendish Astrophysics . ... Institute of Astronomy, Cambridge . ... Institute of Astronomy Astrophysics, Academia Sinica . ... University of Vienna, Institute of Astrophysics . ... Institute for Astronomy, University of Edinburgh . ... Cambridge University . ...

... The analysis shows, that asteroid ­ rubble pile loses its fast fragments in no time but the retaining fragments forms a compact structure immersed in dust ­ gas atmosphere, created by interaction of interplanetary medium with dispersed product of collisional evolution of asteroid. By interaction of an asteroid ­ rubble pile with interplanetary medium structures asteroid can increase its brightness on account of blowed up dust simulating phenomenon of distant comet's brightening. ...