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Neil deGrasse Tyson @neiltyson
This week, Mars & Earth are as close to each other as we’ve seen in 20 years. Have a look — with its tipped axis and a cute little icecap. And, I double-checked, no canals. Thanks to my Princeton colleague Bob Vanderbei for sharing his stunning photo. https://t.co/197GmLsqwu https://t.co/1nAn7luRKF — PolitiTweet.org