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    21. http://zebu.uoregon.edu/messier/m57.txt
    ... late stages in the evolution of low mass stars in which a double shell source (Hydrogen and Helium Burning) around a non-fusing Carbon core is driving the outer layes of the star away, thus revealing a hotter star (the central star of the Planetary nebula ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/messier/m57.txt -- 2.2 Кб -- 28.04.1994
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    22. http://zebu.uoregon.edu/messier/m20.txt
    ... It is a nice illustration of the combined effections of ionization and scattering caused by the large yield of blue and UV photons from newly formed massive stars. ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/messier/m20.txt -- 1.3 Кб -- 27.07.1994
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    23. Astro-2 and the UIT Experiment
    ... The hydrogen is ionized by O-stars and hence each region of emission should have several 10's to hundreds of 0-stars. ... are described here: M31 is not very actively star forming and seems to have a general dearth of hot, young massive stars ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/uit-p.html -- 6.1 Кб -- 07.10.1996
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    24. Fabry-Perot Images of Starburst Galaxies
    ... Starbust galaxies represent those galaxies which are currently experiencing a phase of active star formation which is substantially higher than the time average star formation rate. ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/fp3.html -- 5.4 Кб -- 23.12.1996
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    25. Astro-2 and the UIT Experiment
    ... Some of these sources include: . Stars hotter than 20,000 degrees (e.g. O and B stars) . Central stars of planetary Nebulae . ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/uit-ms.html -- 2.5 Кб -- 07.10.1996
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    26. Formation of the Elements
    ... Making the Periodic Table of Elements via Stellar Evolution . Helium Fusion in Stars . Creating Carbon and Beyond . ... To get beyond iron requires Supernova and neutron capture: . Supernova represent massive stars that go bang .. ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/disted/ph123/lec11.html -- 3.7 Кб -- 23.06.2005
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    27. http://zebu.uoregon.edu/tandf/update.html
    ... Stanek and Garnavich have proposed using "red clump" stars as distance indicators. ... The red clump is a grouping of stars in the HR diagram at the "red" end of the ... Such stars are numerous in our galaxy and hence calibration could come from both ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/tandf/update.html -- 16.7 Кб -- 26.01.1999
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    28. galaxies, Hubble sequence
    ... Galaxies : . A galaxy is a collect of stars, gas and dust bound together by their common gravitational pull. ... nebula', fuzzy objects in the sky that were not planets, comets or stars, is attributed to Charles Messier in the late 1700's ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/disted/ph123/galaxies.html -- 9.5 Кб -- 23.06.2005
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    29. http://zebu.uoregon.edu/2004/a321/lec03.html
    ... We will consider a star as series of shells of mass, each with mass dM r . Within each mass shell, the density is constant. ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/2004/a321/lec03.html -- 6.5 Кб -- 05.02.2004
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    30. http://zebu.uoregon.edu/2004/a321/lec01.html
    ... The only things which can be observed for any given star are . Its apparent flux (measured in ergs cm -2 sec -1 ) . ... Which is a plot of the luminosity of a star (y-axis) versus its temperature or color. ...
    [ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/2004/a321/lec01.html -- 8.8 Кб -- 09.01.2004
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