R Arae - AbsoluteAstronomy.com

R Arae or HD 149730 is an Algol-type

Algol variable

Algol variables or Algol-type binaries are a class of eclipsing binary stars where the orbital plane of the stars are coincident with the line of sight from Earth. When the cooler component passes in front of the hotter one, part of the latter's light is blocked, and the total brightness of the...

eclipsing binary.

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