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According to the Wikipedia article, there are different types of Cepheids; really, I think that each type should be investigated separately.For example, classical Cepheids have 4-20 times the mass of our Sun, and such stars are rare - 85-90% of all stars are less massive than our Sun. And not all such stars will automatically be Cepheids at any specific period of time.
I am not sure about the other types of Cepheids - whether they really ARE rare, or if they are, why. In fact, it would seem that nobody knows for sure - according to Wikipedia, article "Type II Cepheid", "The physical properties of all the type II Cepheid variables are very poorly known."
What else can I help you with?
What has the author Leon Campbell written?
Leon Campbell has written: 'The story of variable stars' -- subject(s): Stars, Variable, Variable stars
What has the author W Strohmeier written?
W. Strohmeier has written: 'Variable stars' -- subject(s): Variable stars
What is an example of a continuous variable?
stars shining stars shining
What type of properties do Variable stars have?
Some aspect is variable, usually their luminosity.
Is stars shining an example of s continuous variable?
No, it is a continuous process but not a continuous variable. The magnitude of star-shine, across all stars is a continuous variable. The magnitude of a star's shine over time is a continuous variable.
Which variable stars have pulsation periods between 1.5 hours and 1.2 days?
RR Lyrae stars. (Sometimes these stars are classed as a type of "Cepheid variable", but they are usually considered as a separate star type.)
How do you describe variable stars?
A variable star is a star whose brightness as seen from Earth that fluctuates.
What do variable stars help astronomers measure?
Distance.
Is movie reviews a discrete variable?
I would have to say so, since there are fixed units assigned (stars and half stars) and a limited number of responses possible. If you could give any amount of stars ( like 2.923 stars) then it would not be a discrete variable.
What has the author Sidney Dean Townley written?
Sidney Dean Townley has written: 'Orbit of Psyche' 'Harvard catalogue of long period variable stars' -- subject(s): Variable stars
Which two groups of stars can have similar brightness?
Variable stars and main sequence stars can have similar brightness. Variable stars, like Cepheid variables, can fluctuate in brightness over time, while main sequence stars maintain a relatively stable brightness due to their fusion processes.
What is the name for stars that brighten then fade?
Stars that brighten and then fade are known as variable stars. Their brightness changes over time due to various factors, such as pulsations, eclipses in binary systems, or eruptive events. Studying variable stars can provide valuable information about the stellar properties and their evolution.
