Friday is International Asteroid Day. A 24-hour live broadcast will include everything you've ever wanted to know about these rocky bits of space debris, the threats they may pose to Earth and what we can gain from studying them.
원문출처 : http://www.cnn.com/2017/06/30/us/asteroid-day-2017/index.html
원문출처 : http://www.cnn.com/2017/06/30/us/asteroid-day-2017/index.html