Topic: Pulsating Variable Star
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What causes pulsating variable stars to pulsate?
When the core of a massive star is compressed during a supernova explosion, then collapses into a neutron star, it retains most of its angular momentum. Since it has only a tiny fraction of its original radius, a neutron star is formed with... Read More »
Source: http://wiki.answers.com/Q/What_causes_pulsating_variable_stars_to...
Why do variable stars pulsate in brightness?
From the mighty brains at Wikipedia: http://en.wikipedia.org/wiki/Variable_star "About two-thirds of all variable stars appear to be pulsating. In the 1930s astronomer Arthur Stanley Eddington showed that the mathematical equations that des... Read More »
Source: http://www.answerbag.com/q_view/127549
What is a Variable Star?
A variable star is a star that has changes in its brightness. A periodic variable star's brightness changes on a schedule that is regular. An irregular variable star has a brightness that changes randomly. Read More »
Source: http://answers.ask.com/Science/Astronomy/what_is_a_variable_star
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Pulsating Variable Star
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polaris
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Source: http://wiki.answers.com/Q/Which_of_these_is_a_pulsating_star
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation with it's magnetic pole pointing towards Earth. So a pulsar is a neutron star, it's just we can observe the beam from Earth.
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Source: http://wiki.answers.com/Q/What_is_another_name_for_a_pulsating_st...
( ′pəl′sād·iŋ ′stär ) (astronomy) Variable star whose luminosity fluctuates as the star expands and contracts; the variation in brightness is thought to come from the periodic change of radiant energy to gravitational energy and back.
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Source: http://www.answers.com/topic/pulsating-star
The time it takes for a Cepheid star to go from it's brightest, to it's dimmest, and back to it's brightest again. =] Hope that helped.
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Source: http://wiki.answers.com/Q/What_is_the_pulsation_period_of_a_Cephe...
Cepheid variables are a class of bright, variable stars, with the property that the period of the variation is related to their absolute luminosity. So they can be used to determine the distance, by comparing the measured apparent luminosit...
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Source: http://answers.yahoo.com/question/index?qid=20100330120421AAUT8td
As the temperature drops, the star will become dimmer and its colour will change. Many variable stars (especially pulsating ones) go through a range of spectra as they pulse. Sounds like you have a star that changes from F to mid-M, so its ...
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Source: http://answers.yahoo.com/question/index?qid=20090606183001AABQwJW
