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variable star

Syllabification: var·i·a·ble star

Definition of variable star in English:

noun

Astronomy
A star whose brightness changes, either irregularly or regularly.
Example sentences
  • Cepheid variable stars tend to be extra bright.
  • They'll also be searching for storms on Mars and Jupiter, monitoring active galactic nuclei, and measuring variable stars.
  • He discovered the mass-luminosity relationship for stars, he calculated the abundance of hydrogen, and he produced a theory to explain the pulsation of Cepheid variable stars.

Definition of variable star in:

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