Cepheid variable stars are intrinsic variables which pulsate in a predicatable way. In addition, a Cepheid star's period (how often it pulsates) is directly related to its luminosity or brightness. Cepheid variables are extremely luminous and very distant ones can be observed and measured.
When it comes to dependability, the ones which truly help are the ones who give an exact indication of their ability and an indissoluble promise about their efforts.
Ceoheid Star's pulsating frequency is directly proportional to its luminosity. My pulsating frequency should match mine. Its not a bad idea to be the star which is the most dependable of them all .
