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Unusual fluctuations in the brightness of older sun-like stars have long mystified astronomers, and new, detailed observations of the phenomenon have only deepened the mystery. ... Original Story: Mystery of Changing Star Brightness Deepens...
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news.yahoo.com/s/space/20091207/sc_space/mysteryofchang...
news.yahoo.com/s/space/20091207/sc_space/mysteryofchangingstarbrightnessdeepens
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New observations deepen mystery of brightness fluctuations in sun-like stars. ... Mystery of Changing Star Brightness Deepens ; By SPACE.com Staff; posted: 07 December 2009; 11:43 am ET;
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www.space.com/scienceastronomy/091207-sun-stars-brightn...
www.space.com/scienceastronomy/091207-sun-stars-brightness.html
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Stars come in different colors, sizes, shapes and ages. One trait that makes a star unique is its brightness. ... Luminosity: The intrinsic brightness of a star -- as it would appear if you orbiting it -- compared to the Sun. The Sun's luminosity is 1. Sirius has a luminosity of 23 and Betelgeuse 55, 000.
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www.space.com/scienceastronomy/brightest_stars_030715-1...
www.space.com/scienceastronomy/brightest_stars_030715-1.html
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Star brightness.(excerpt from 'Astronomy for All Ages: Discovering the Universe through Activities for Children and Adults') ... find Science Activities articles. The following are two activities that will help your students think about and understand the concepts of star b... ... How Bright Is That Star...
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www.highbeam.com/doc/1G1-17246125.html
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The light a star emits during its lifetime will change. When a star exhausts its nuclear fuel, ... Response #: 2 of 2 Author: hawley The brightness of stars as seen from the Earth is called "apparent visual magnitude"; it is designated by "m subscript v" and is a logarithmic scale like the Richter scale used for earthquakes.
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www.newton.dep.anl.gov/newton/askasci/1995/astron/AST16...
www.newton.dep.anl.gov/newton/askasci/1995/astron/AST162.HTM
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Star Brightness Magnitude; Human Eye; Effect of Integration in StellaCam; Hot Pixels; Imaging Chip ; Mintron; SAC/Mintron; Watec; ASTROVID; Mallin Cam; f Number and Pixel Size; Spectral Response; Links Stellar Time Keeping;
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www.prc68.com/I/Mag.shtml
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A basic observable quantity for a star is its brightness. Because stars can have a very broad range of brightness, astronomers commonly introduce a logarithmic scale called a magnitude scale to classify the brightness.
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csep10.phys.utk.edu/astr162/lect/stars/magnitudes.html
csep10.phys.utk.edu/astr162/lect/stars/magnitudes.html
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With further measurements it was found that four stars were brighter than first-mag., but instead of changing the scale these stars were given negative magnitudes. The most important thing to remember is that as magnitude decreases a star's brightness increases.
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members.ncats.net/astro/reference/mag.html
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Apparent magnitude - Wikipedia, the free encyclopedia
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The apparent magnitude ( m ) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere. The bri...
en.wikipedia.org/wiki/Apparent_magnitude
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