Happy Pi Day! Nerds celebrate 3/14
Calling all math lovers: it’s Pi Day, celebrated on March 14, or 3/14, every year.
Symbolized by the Greek letter “π,” Pi is the symbol used in mathematics to represent the ratio of a circle’s circumference to its diameter. No matter how big or small a circle is, Pi is always the same: 3.14159 ...
Pi has been calculated to over one trillion digits beyond that decimal point. An irrational number, it continues on infinitely.
To mark the day, NASA took the opportunity to explain how it uses Pi in all sorts of real-life applications. For instance, a technique called “pi transfer” uses the gravity of Saturn’s moon, Titan, to alter the orbit of NASA’s Cassini spacecraft so it can obtain different perspectives of the ringed planet.
The space agency’s engineers also use Pi to determine the volume and surface area of propellant tanks, which keep spacecraft going in crucial missions.
It's #PiDay! It may be irrational, but pi plays an important role in the work of scientists at NASA: https://t.co/IB9QY0E1D4 Happy Pi Day! pic.twitter.com/b5zmGbb6qs
— NASA (@NASA) March 14, 2017
In Colorado, the Rockies posed in perfect Pi formation:
What are the chances!?#PiDay pic.twitter.com/xJJz8tsAn3
— Colorado Rockies (@Rockies) March 14, 2017
Others had fun with Pi-inspired posts on social media:
He's irrational and he goes on and on. Happy #PiDay #SXSW pic.twitter.com/EpRMec2TTw
— Michael Chase (@chasethisnow) March 14, 2017
An example of Pi entrepreneurship:
In honor of Pi Day everyone venmo me $3.14
— m. (@HmmMo_) March 14, 2017
Theoretical physicist Lawrence Krauss encouraged his followers to take Pi Day to heart:
And let me be the first.. or maybe not.. to wish you happy PI day! May you be transcendental, and irrational today!
— Lawrence M. Krauss (@LKrauss1) March 14, 2017
Of course, Pi Day is also a good excuse to celebrate all things pie-related:
Happy Pi day. pic.twitter.com/ud1b1GK9cj
— You Had One Job (@_youhadonejob1) March 14, 2017
Happy #PiDay pic.twitter.com/fXs2cIWQVF
— Sharon (@IsSharonHomeYet) March 14, 2017
It’s the most numberful time of the year. 🍰 #PiDay pic.twitter.com/yXrGrBE81w
— Tumblr (@tumblr) March 14, 2017
As far as we know, Pi Day was first celebrated in 1988. In 2009, the U.S. House of Representatives passed a resolution making Pi Day official, and encouraged educators to embrace the holiday with classroom lessons about Pi.