NASA plans to send an enormous balloon to the edge of Earth's stratosphere in search of secrets about how stars and planets form.
원문출처 : https://www.cnn.com/2020/07/27/us/nasa-balloon-asthros-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/07/27/us/nasa-balloon-asthros-scn-trnd/index.html