
NASA @NASA
As we #CountdownToMars for @NASAPersevere's landing, learn about operating a rover 100 million miles away, and making sure it gets to where the science team wants to go. @MarsCuriosity driver Sophia Mitchell explains in the latest #GravityAssist podcast: https://t.co/YfMc2cUPwB https://t.co/CfjP7yDZ8Z — PolitiTweet.org