当地时间2019年2月13日，美国加州帕萨迪纳市，“机遇号”火星车因一场席卷火星的沙尘暴失联约8个月后，美国航空航天局NASA正式宣布了它的“死讯”。就在数周前，NASA刚刚庆祝机遇号在火星上度过第15个生日。图片作者:Mario Tama/视觉中国

　　PASADENA, CALIFORNIA - FEBRUARY 13: Keri Bean, NASA Tactical Uplink Lead for the rover Opportunity, hugs a colleague at a press conference announcing the conclusion of the Opportunity mission on February 13, 2019 in Pasadena, California. After 15 years, the Mars rover has finally stopped responding following an immense dust storm on the planet. (Photo by Mario Tama/Getty Images)