O-Type Giants
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Home > Art, Film & Photography > O-Type Giants: Blue Giant, XI Persei, Lambda Orionis, Zeta Ophiuchi, Iota Orionis, Lh54-425
O-Type Giants: Blue Giant, XI Persei, Lambda Orionis, Zeta Ophiuchi, Iota Orionis, Lh54-425

O-Type Giants: Blue Giant, XI Persei, Lambda Orionis, Zeta Ophiuchi, Iota Orionis, Lh54-425


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About the Book

Chapters: Blue Giant, Xi Persei, Lambda Orionis, Zeta Ophiuchi, Iota Orionis, Lh54-425. Source: Wikipedia. Pages: 22. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: In space sciences, a blue giant is a star with a spectral type of O or B (thus being noticeably blue in appearance) and a luminosity class of III (giant). In the standard Hertzsprung-Russell diagram, blue giants are found in the upper left corner, due to their high luminosity and early spectral type. A blue giant is a massive star that has exhausted the hydrogen fuel in its core and left the main sequence. Blue giants have a surface temperature of around 30000K and a luminosity some 10000 times that of the Sun. As they grow older they expand and cool, eventually becoming red giants, or continuing fusion into a more luminous or massive star. Blue giants are extremely luminous, reaching absolute magnitudes of -5, -6 and even higher. Their surface temperature is high enough (20,000 K or more) that a sizable fraction of their energy output is in the ultraviolet range, thus invisible to our eyes. Most stars of this type are found in O-B associations, large collections of loosely bound young stars. Since they are so hot (but not very dense), their expected life is very short (in the order of tens or hundreds of million years), and current theories predict that most of them will end their lives as supernovae. Blue giant is a misused term, as giant usually implies an advanced evolutionary state in which the star fuses helium in its core, instead of hydrogen (see red giant). There are no "real" blue giants, stable stars of classification OxIII or BxIII, instead stars such as Bellatrix (B2III) are middle-aged massive stars which are on the process of becoming massive bright giants (class II), very much unlike red giant stars such as Arc...More: http: //booksllc.net/?id=28821


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Product Details
  • ISBN-13: 9781158550128
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • No of Pages: 24
  • Spine Width: 1 mm
  • Weight: 50 gr
  • ISBN-10: 115855012X
  • Publisher Date: 15 Sep 2010
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Blue Giant, XI Persei, Lambda Orionis, Zeta Ophiuchi, Iota Orionis, Lh54-425
  • Width: 229 mm


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