NASA'sSpaceXCrew-2 carrying four astronauts was launched on a Falcon 9rocket from theKennedy Space Centerin Florida on Friday.
00:59 Perseverance, the biggest, most advanced rover ever sent by NASA, became the ninth U.S. spacecraft to successfully land on Mars. See the celebration from ground controllers and t
04:13 CGTN's Gerald Tan discusses space exploration with former NASA astronaut and international space station commander Leroy Chiao.
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