"What's the biggest star we know?" What is the biggest star we know? "What's the biggest star we know?" "What's the biggest star we know?" What is the biggest star we know? "What's the biggest star we know?" NASA: What is the biggest star we know? "What's the biggest star we know?" "What's the biggest star we know?" "What's the biggest star we know?" "What's the biggest star we know?" "What's the biggest star we know?" NASA: What is the biggest star we know? "What's the biggest star we know?" What is the biggest star we know? NASA: What is the biggest star we know?