The Twitter profile of NASA Moon blocked the Twitter profile of NASA Sun & Space on Monday, when the US witnessed its first coast-to-coast eclipse in 99 years. NASA Sun replied, "Uh EXCUSE me?!? #solareclipse2017." After the eclipse, NASA Moon unblocked NASA Sun, and tweeted, "Let the Sun shine @NASASun, I unblocked you in the sky and on Twitter :)".