The difference between Trinary star and Triple star
When used as nouns, trinary star means a stellar system that has three stars orbiting around each other, whereas triple star means three stars which form a stellar system, such that they orbit the point of equilibrium of their gravitational fields.
check bellow for the other definitions of Trinary star and Triple star
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Trinary star as a noun (star):
A stellar system that has three stars orbiting around each other; triple star.
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Triple star as a noun (star):
Three stars which form a stellar system, such that they orbit the point of equilibrium of their gravitational fields; a trinary star.
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Triple star as a noun (star):
Three stars that appear to be one when seen with the naked eye, either because they orbit one another (trinary stars) or happen to be in the same line of sight even though they are separated by a great distance.