eclipsing binary

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Binary (double) star in which the two stars periodically pass in front of each other as seen from Earth.

When one star crosses in front of the other the total light received on Earth from the two stars declines. The first eclipsing binary to be noticed was Algol.

The colours of the flag date from Napoleon's invasion in 1796. The design is based on the French tricolour. Effective date: 19 June 1946. >>