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Former NASA astronaut Leroy Chiao on Hubble telescope 'single star' discovery
Leroy Chiao, former NASA astronaut and International Space Station commander speaks to the 蜜芽传媒's Christian Fraser on the discovery of "Earendel" the most distant, single star yet imaged by a telescope and on the return of US astronaut Mark Vande Hei to Earth from the ISS.
