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Olympic champion Su Yiming named UNCCD Sport4Land ambassador_我的网站

A |     (ECNS) -- Chinese Olympic snowboarding champion Su Yiming has been named the Sport4Land Champion for Resilience by the United Nations Convention to Combat Desertification (UNCCD) on Wednesday.        Su will promote public participation in land restoration, drought resilience and sustainable land management.    "The mountains gave me the opportunity to pursue my dreams. Protecting nature means preserving the same opportunities for future generations," he said.    At 22, Su is one of the world’s top snowboarders, winning gold and silver at the 2022 Beijing Winter Olympics and adding gold and bronze at the 2026 Milano Cortina Games.    He also founded the Super Sports Foundation to support grassroots sports. His appointment comes ahead of UNCCD COP17 in Ulaanbaatar, Mongolia, Aug. 17–28.    (By Helen Mo, intern Liu Shuangjing)                    。根据芬兰达勒姆大学和赫尔辛基大学的一项研究，大麦哲伦星云可能在20亿年内与银河系相撞。目前，这项研究已经发表在国际顶级天文杂志《皇家天文学会月报》上。大麦哲伦星云距离银河系约163000光年。天文学家先前认为大麦哲伦星云将绕银河系运行数十亿年，甚至可能逃离银河系。

B | 研究人员发现，大麦哲伦星云的质量远远超过预期，其轨道能量会由于动态摩擦力而迅速衰减，可能在20亿年内与银河系碰撞并合。

C | 模拟结果表明，撞击将给银河系带来毁灭性的灾难。

D | 银河系中冬眠的黑洞将被激活，迅速扩大到10倍，质量增加8倍。活跃的黑洞将释放大量高能辐射流。如果喷气式飞机产生的伽马射线到达地球，它将破坏臭氧层并导致大量的生物灭绝。然而，研究人员也发现，太阳系很可能会在撞击中被抛出银河系，抛入一个更大的空间，因此地球将得以幸免。先前的天文学家预测仙女座星系将在80亿年内撞击银河系，这项研究将银河系与其他星系之间可能的碰撞时间提前了60亿年。

E |

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Published on:03:57:18