Ron Shaneyfelt: 太空想殺了我們嗎？ - 朗雪尼菲爾特 (Ron Shaneyfelt)

太空想殺了我們嗎？ - 朗雪尼菲爾特 (Ron Shaneyfelt)

完整課程請見: http://ed.ted.com/lessons/is-space-trying-to-kill-us-ron-shaneyfelt

巨大小行星對地球及居民造成重大偒害的機率有多大？還有太陽──是不是快要燒完了？銀河系中心的超大質量黑洞──我們該擔心嗎？朗雪尼菲爾特 (Ron Shaneyfelt) 評估了太空的各種危機。

課程: Ron Shaneyfelt  動畫: Retchy

Space is full of hazards, from asteroids to black holes, but most threats are less immediate than they seem. The odds of asteroid Apophis hitting Earth in 2036 were once 1 in 625, but scientists now say the risk is extremely low. The sun has enough fuel to last billions of years, and the galaxy’s supermassive black hole is safely distant. Despite dramatic dangers, life on Earth remains far more vulnerable to everyday risks than to cosmic disasters.