I'm a beginner. I was watching news about JAXA's はやぶさ2 mission and I think it is pronounced はやぶさ つ. Can someone please confirm that "2" is pronounced "つ" and explain why.
What you're hearing is likely just the Japanese way of saying the English "two"—which sounds like the つ sound because that "t" sound in words like "two" and "two" doesn't exist in Japanese.
Some people may also call the spacecraft the はやぶさ2号, or "Hayabusa 2-go," which I believe is the official name.