One of the Earth's longest-flying spacecraft has detected a "persistent hum" beyond our solar system, according to a new study.
원문출처 : https://www.cnn.com/2021/05/11/world/nasa-voyager-1-intl-scli-scn/index.html
원문출처 : https://www.cnn.com/2021/05/11/world/nasa-voyager-1-intl-scli-scn/index.html