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    1. Nuclear fusion of hydrogen into helium powers stars, but fusion requires a lot
    ... Nuclear fusion of hydrogen into helium powers stars, but fusion requires a lot of energy. Where does this energy come from? ... all atomic nuclei have been separated from their electrons, so each hydrogen atom is really just a proton and thus holds a ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/magazine/ask-astro/2014/09/fusions-fuel -- 63.7 Кб -- 10.04.2016
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    2. Adding color to Hydrogen-alpha, part 2 | Astronomy.com
    ... Home . / . Magazine . / . Tony Hallas' Cosmic Imaging . / . Adding color to Hydrogen-alpha, part 2 . FROM THE August 2011 ISSUE . ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/magazine/tony-hallas/2011/06/adding-color-to-hydrogen-alpha-part-2 -- 63.2 Кб -- 10.04.2016
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    3. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B42B1C308-7C7B-4FE9-9386-7815BC84B35B%7D
    ... The super-Earth has a relatively small rocky core, an atmosphere of methane, water, and hydrogen, and an extended hydrogen envelope. ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B42B1C308-7C7B-4FE9-9386-7815BC84B35B%7D -- 3.2 Кб -- 10.04.2016
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    4. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B849F6A9C-E883-42F0-B5F9-A01E1FC1F120%7D
    ... central region of galaxy NGC 6946 in optical light (blue), the dense hydrogen tracing out the galaxy s sweeping spiral arms and galactic halo (orange), and the extremely diffuse and extended field of hydrogen engulfing NGC 6946 and its companions (red ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B849F6A9C-E883-42F0-B5F9-A01E1FC1F120%7D -- 4.5 Кб -- 10.04.2016
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    5. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BE8EBDE39-7B72-4125-B782-E3801AAC81EB%7D
    ... As a star "burns" hydrogen in fusion reactions, helium builds up in the star's core. ... Helium is more dense than hydrogen, and since waves travel more quickly through denser material, waves travel faster through ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BE8EBDE39-7B72-4125-B782-E3801AAC81EB%7D -- 4.0 Кб -- 10.04.2016
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    6. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B300B2436-F429-4993-9972-B1791816AA27%7D
    ... knowing how the cores of stars change (starting in the bottom left corner in the sequence above) from hydrogen fusion-burning cores to helium fusion-burning cores, with intermediate stages where hydrogen fusion-burning shells expand into red giant sizes ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B300B2436-F429-4993-9972-B1791816AA27%7D -- 4.1 Кб -- 10.04.2016
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    7. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B03898BFB-2DBB-49AC-B67A-F462A552FA97%7D
    ... from specific chemical elements in the star s outer layer, like hydrogen or iron, absorbing specific frequencies of light ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B03898BFB-2DBB-49AC-B67A-F462A552FA97%7D -- 4.5 Кб -- 10.04.2016
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    8. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B3BBDBD75-9C0D-4910-803B-16913D010661%7D
    ... Normally, galaxies use their reservoirs of hydrogen gas to create new stars, but NGC 4569 (center) is missing most of its ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B3BBDBD75-9C0D-4910-803B-16913D010661%7D -- 3.3 Кб -- 10.04.2016
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    9. River of hydrogen flowing through space seen with Green Bank Telescope |
    ... hydrogen tracing out the galaxy s sweeping spiral arms and galactic halo (orange ... is that rivers of hydrogen known as cold flows may be ferrying hydrogen through ... hydrogen a feature commonly seen in spiral galaxies that may be formed by hydrogen ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/news/2014/01/river-of-hydrogen-flowing-through-space-seen-with-green-bank-telescope -- 70.6 Кб -- 10.04.2016
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    10. Astronomers discover surprising clutch of hydrogen clouds lurking among our
    ... Shop . Home . / . News . / . Astronomers discover surprising clutch of hydrogen clouds lurking among our galactic neighbors . ...
    [ Сохраненная копия ]  Ссылки http://www.astronomy.com/news/2013/05/astronomers-discover-surprising-clutch-of-hydrogen-clouds-lurking-among-our-galactic-neighbors -- 72.3 Кб -- 10.04.2016
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