Which famous eclipsing binary star system was used by astronomers to establish the first accurate mass measurements of stars outside our solar system?

Stars aren't always solitary travelers through the cosmos. Some exist in fascinating dual systems that create spectacular astronomical phenomena. Among the most intriguing are eclipsing binary stars - stellar pairs that, from our perspective on Earth, pass in front of each other in their orbital dance. These stellar duos have taught astronomers volumes about star formation, evolution, and the fundamental properties of stars. Test your knowledge about these fascinating cosmic partnerships!

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