# Neil deGrasse Tyson celebrates ‘Pi Day’ with seemingly endless number of tweets about Pi

‘Pi Day,’ the day when we celebrate the symbol used in mathematics to represent the circumference of a circle to its diameter, is today, and nobody seemed quite as excited about it as astrophysicist and *Cosmos* host Neil deGrasse Tyson who spent the day on Twitter sharing his ‘Pi’ knowledge with his followers.

Pi, which has been calculated out to more than one trillion digits — but is generally represented by 3.1415 — has a special meaning today with the first five digits matching today’s date: 3/14/15.

In honor of the only ‘true’ Pi day this century, deGrasse Tyson shared a wealth of knowledge about about the mathematical novelty that only a nerd could love.

See below:

Happy Birthday to all Pi-Day people. Including @BillyCrystal @TheMichaelCaine Apollo Astronaut Frank Borman & Albert Einstein

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

Pi, written with enough digits to show all numerals in base 10: 3.14159265358979323846264338327950

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

Enough Pi for everyone: 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

Best Pi-Day Ever: 53 minutes & 58 seconds after 6 o’clock, March 14, the year 1592: 3/14/1592; 6:53:58

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

Best Pi-Day of the future: 6 minutes & 53 seconds after 2 o’clock, May 9 (or Sept 5), the year 3141: 3141/5/9; 2:6:53

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

My next tweet will contain every single digit of Pi…

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

Get your Geek on. Time to fit all the digits of Pi into a single tweet: Pi in base Pi = 10

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

The “P” sound in the Greek letter Pi evokes “periphery”. Multiply any circle’s diameter by Pi and you get its circumference.

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

The Bible’s best estimate for Pi: 3.0 (1 Kings 7:23)

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

Yup. I’ve been Pi-Lingual since childhood. I want to be ready. May need it in a first exchange of greetings with Space Aliens

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

I’m all Pi’ed out. But okay, one more…

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

You’re curious — I can feel it. How many digits of Pi before the numerals 0123456789 appear in sequence? 17,387,594,879

— Neil deGrasse Tyson (@neiltyson) March 14, 2015

And then, unlike Pi, he came to the end…