If it seems like Mars is a popular destination right now, that's for a reason: The chance to fly there only comes around every 26 months.
원문출처 : https://www.cnn.com/2020/07/27/world/mars-mission-launches-summer-2020-scn/index.html
원문출처 : https://www.cnn.com/2020/07/27/world/mars-mission-launches-summer-2020-scn/index.html