: a binary star system in which the two stars are close enough together for material to pass between them
Examples of contact binary in a Sentence
Recent Examples on the WebUltima Thule — considered a contact binary — is the most distant world ever explored.
Marcia Dunn, The Seattle Times, 12 Feb. 2019 It’s two asteroids that have collided and stuck together many years ago, becoming what’s known as a contact binary.
Avery Thompson, Popular Mechanics, 2 Jan. 2019
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'contact binary.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.