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In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris and there is an increasing problem of satellites mysteriously breaking down. With first-hand accounts from astronauts and experts, Horizon reveals the scale of the problem of space junk. Our planet is surrounded by hundreds of millions of pieces of junk moving at 17,000 miles...。音乐家尹道贤、李素罗、柳熙烈以及卢洪哲前往街头演出发达的爱尔兰，进行街头表演的旅行类真人秀。。