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Neil deGrasse Tyson

@neiltyson ↗

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Last Checked May 18, 2019

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Sat Jun 30 20:15:50 +0000 2012

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Neil deGrasse Tyson @neiltyson

.@fractal74 Pure GPS time, from 1980 onward, adds none of the 15 LeapSeconds since then. After today they'll be 16 secs ahead — PolitiTweet.org

Posted June 30, 2012 Hibernated

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Neil deGrasse Tyson @neiltyson

How are Leap Seconds added? At the Prime Meridian, 12:00:00 normally follows 11:59:59pm but will instead follow 11:59:60pm — PolitiTweet.org

Posted June 30, 2012 Hibernated

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Neil deGrasse Tyson @neiltyson

Today's LeapSecond across USA: 7:59:60pET / 6:59:60pCT / 5:59:60pMT / 4:59:60pPT. I'll be having a (small) glass of Champagne — PolitiTweet.org

Posted June 30, 2012 Hibernated