PULSATING VARIABLE Meaning and
Definition
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A pulsating variable refers to a type of star that exhibits periodic changes in its brightness. This astronomical term is used to describe certain types of stars that undergo fluctuations in their luminosity over time. These variations occur due to changes in the star's physical properties and internal processes.
Pulsating variables are typically observed to pulsate in a regular and repetitive manner. The changes in their brightness can occur over relatively short time intervals, ranging from a few minutes to several months. This behavior is often attributed to intrinsic characteristics of the star's structure and composition.
The variations in brightness of pulsating variables are thought to be caused by specific mechanisms such as changes in their internal temperature, nuclear reactions, or pulsations of their outer layers. These stars can be classified into different types based on their period of variation and other characteristics.
Pulsating variables play a crucial role in the field of astrophysics, as their study provides valuable insights into stellar evolution, stellar interiors, and physical processes occurring in stars. By observing the changes in their brightness, astronomers can gain information about the star's physical properties, such as its mass, radius, and luminosity. This, in turn, helps in understanding the life cycles of stars and the overall dynamics of the universe.
Etymology of PULSATING VARIABLE
The word "pulsating" comes from the Latin word "pulsatus" which means "beating" or "throb". It is derived from the verb "pulsare", which means "to beat" or "to strike".
The word "variable" comes from the Latin word "variabilis" which is derived from the noun "varius" meaning "various" or "different".
In the context of astronomy, the term "pulsating variable" refers to a type of star that undergoes regular changes in brightness, with its surface expanding and contracting in a pulsating manner. The term "pulsating" describes the rhythmic pattern of changes in brightness, while "variable" refers to the characteristic of changing brightness.
