A European robot probe has made the first, historic landing on a comet, but its status is uncertain after harpoons failed to anchor it to the surface. 欧洲一架机器人探测器在人来历史上首次成功在彗星上着陆，但是由于着陆器...
A European robot probe has made the first, historic landing on a comet, but its status is uncertain after harpoons failed to anchor it to the surface. 欧洲一架机器人探测器在人来历史上首次成功在彗星上着陆，但是由于着陆器...
南非科学家发现首个彗星曾撞击地球证据 JOHANNESBURG South African researchers say they have found conclusive evidence of earth's first-ever known comet strike, about 28 million years ago. The researchers say this exciting find in rura...
US Space Probe to Reveal Comet's Secrets 美国航天探测器揭示彗星状况 A U.S. spacecraft is completing afive-and-a-halfmonth voyage to a distant comet and could create celestial fireworks wh...
