isEclipsingBinary

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: isEclipsingBinary

Indicates that two stars form a binary system whose orbital plane is aligned so that, from the observer’s viewpoint, one periodically passes in front of the other, causing observable eclipses in brightness.