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    11. http://www.armaghplanet.com/pdf/AstroTopics/Stars%20and%20Constellations/The%20size%20of%20Space.pdf
    ... that the yellow variable stars called cepheids pulse at a steady beat proportionate ... By watching the pulse rate of a cepheid we can tell how bright it is and work out ...
    [ Текст ]  Ссылки http://www.armaghplanet.com/pdf/AstroTopics/Stars%20and%20Constellations/The%20size%20of%20Space.pdf -- 75.1 Кб -- 20.09.2011
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    12. Most distant galaxy ever seen | Astronotes
    ... useful type of star for this kind of measurement is known as a Cepheid variable ... Cepheids pulse at a rate directly related to their brightness, so you just look out ...
    [ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/as-far-as-our-eyes-can-see.html -- 47.7 Кб -- 09.04.2016
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    13. - Part 39
    ... 6 Comments Cepheid variables are massive, pulsating stars, valued by astronomers for the precise link between their brightness ... Let?s look at the history of Cepheid variables and how recent [ ] . Continue Reading... Posted on November 26, 2010 | ...
    [ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/author/admin/page/39 -- 55.3 Кб -- 09.04.2016
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    14. Our Galaxy | Astronotes - Part 4
    ... 6 Comments Cepheid variables are massive, pulsating stars, valued by astronomers for the precise link between their brightness ... Let?s look at the history of Cepheid variables and how recent [ ] . Continue Reading... Older Entries . Newer Entries . ...
    [ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/category/our-galaxy/page/4 -- 55.1 Кб -- 09.04.2016
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    15. Astronotes | Armagh Planetarium's astronomy news from across the Universe -
    ... 6 Comments Cepheid variables are massive, pulsating stars, valued by astronomers for the precise link between their brightness ... Let?s look at the history of Cepheid variables and how recent [ ] . Continue Reading... Posted on November 26, 2010 | ...
    [ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/page/39 -- 53.9 Кб -- 09.04.2016
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    16. http://www.armaghplanet.com/pdf/Astronotes/Astronotes2006/Astronotes_Nov_2006.pdf
    ... There is a type of giant yellow variable star called a Cepheid. ... to be identified, but the are many others, in fact familiar Polaris is a cepheid ... astronomer called Henrietta Leavitt realized something very special about cepheids ...
    [ Текст ]  Ссылки http://www.armaghplanet.com/pdf/Astronotes/Astronotes2006/Astronotes_Nov_2006.pdf -- 1550.5 Кб -- 20.09.2011
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    17. http://www.armaghplanet.com/pdf/Astronotes/Astronotes2008/Astronotes_Sept_2008.pdf
    ... This more than just a curiosity; cepheid variables are very important to astronomers ... between the period of a cepheid's variation and its brightness (or luminosity ...
    [ Текст ]  Ссылки http://www.armaghplanet.com/pdf/Astronotes/Astronotes2008/Astronotes_Sept_2008.pdf -- 1018.9 Кб -- 20.09.2011
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    18. http://www.armaghplanet.com/pdf/Astronotes/Astronotes2007/Astronotes_Jan_2007.pdf
    ... that the yellow variable stars called cepheids pulse at a steady beat proportionate ... By watching the pulse rate of a cepheid proportional to the galaxies' distances. ...
    [ Текст ]  Ссылки http://www.armaghplanet.com/pdf/Astronotes/Astronotes2007/Astronotes_Jan_2007.pdf -- 2187.1 Кб -- 20.09.2011
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    19. Female Astronomers Who Struggled for the Stars | Astronotes
    ... be estimated from its pulsation rate then we could determine how distant any of these Cepheid variable stars were from Earth ... for the Nobel Prize for the work she had done on the Cepheid variables and was unaware of her death the four years prior ...
    [ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/3-female-astronomers-who-struggled-for-the-stars.html -- 56.9 Кб -- 09.04.2016
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    20. Female Astronomers Who Struggled for the Stars | Astronotes
    ... be estimated from its pulsation rate then we could determine how distant any of these Cepheid variable stars were from Earth ... for the Nobel Prize for the work she had done on the Cepheid variables and was unaware of her death the four years prior ...
    [ Сохраненная копия ]  Ссылки http://www.armaghplanet.com/blog/3-female-astronomers-who-struggled-for-the-stars.html?replytocom=58589 -- 56.9 Кб -- 10.04.2016
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