When NASA's InSight lander was on its seven-month trip to Mars, it wasn't alone. Two suitcase-size spacecraft, called MarCO, followed InSight on its journey. They were the first cube satellites to fly into deep space. And now, they've fallen silent.


원문출처 : https://www.cnn.com/2019/02/07/world/nasa-mars-insight-marco-satellites/index.html