My 2019 Birthday Star

I was born 51 years ago today. To mark the occasion, here’s a 51-pointed star. It’s made of {17/7} heptadecagrams repeated 3 times, and with their edges extended as lines, in three different colors. This works because 51 = (17)(3).

Fiftystar: My 2018 Birthday Star

Every year, it is my tradition to make a star for my birthday. This is the one for today, with fifty points for my new age.

star 50

I like the view from age 50. I can see half-centuries before and after right now. To see 1968, I look into the past, which is behind me. If I look forward, I see ideas for what 2068 could be like.

On Dr. Martin Luther King, Jr.’s Birthday: A Public Service Announcement

This year, in the USA, the birthday of Dr. Martin Luther King, Jr. is observed tomorrow. However, it is today — January 15th — which is his actual birthday. 

brand_bio_bio_martin-luther-king-jr-mini-biography_0_172243_sf_hd_768x432-16x9

Source of image: http://www.biography.com/people/martin-luther-king-jr-9365086

My 2017 Birthday Stars

I turn 49 today. This is a 49-pointed star, to mark the occasion — an old tradition of mine.

49

My first birthday was in 1968 — on the day I was born. A year later, on my second birthday, I turned one year old. Carry this up to the present, and that makes today, when I turn 49, my 50th birthday. For those reasons, here’s a second star, with 50 points.

50

 

Older Birthday Stars, From When I Was Younger

I started this blog in July of 2012, so the birthday stars I made in January 2012 (when I turned 44) and January 2011 (when I turned 43) did not appear here in those years. I found them, though, and will post them now.

The first two are different colorings of a 44-pointed star, from January 12, 2012, the day I turned 44:

birthday star 44 from 2012 Bbirthday star 44 from 2012

These three are different color-versions of 43-pointed stars, from a year earlier — January 12, 2011:

43 star{36_slash_17} schlafli symbol star 2012

43

I turn 48 today, so please visit the post right before this one, if you’d like to see this year’s birthday stars. =)

My Birthday Stars for 2016

This year, I’m continuing my personal tradition of making stars on my birthday with numbers of points which increase each year. I’ve done this for years, and it’s based on a game I started when I turned three, and claimed the three stars of Orion’s belt as my personal property, on the grounds that they were obviously put in the sky for my benefit. Most recently, a year ago, when I turned 47, I posted a 47-pointed star on this blog.

I’m turning 48 today, so here are a couple of different colorings of 48-pointed stars containing segments through the center, {6/2} compound-triangle stars, and {8/3) star octagons, made possible by the fact that 48 = (6)(8).

star 48b

star 48a

Of course, I am turning 48 on my 49th birthday (and if that makes no sense to you, here’s the explanation), so this year I also made 49-pointed stars. They are based on 49 being the square of seven, and so contain seven each of the two types of star heptagram possible, in two different colors. For this star, also, I made two versions.

star49a

star49b

On your nth birthday, you turn n – 1 years old.

birthday cake

As a teacher, I have had variants of this conversation many times. The specific details, however, are fictional, for this changes, somewhat, each time it happens.

  • Student: Guess what? It’s my birthday!
  • Me: Congratulations! How old are you?
  • Student: I’m seventeen!
  • Me: Well, happy 18th birthday, then!
  • Student: Huh?
  • Me: Look, on that one day, 17 years ago, when you were born, that was your birthday. That day has a better claim on being your birthday than any other day, because it’s the day you were born. That was your first birthday. But you weren’t one year old yet. You turned one year old a year later, on your next birthday . . . your second birthday. A year later, on your third birthday, you turned two years old. Do I need to continue?
  • Student: So I’m 18? I can buy cigarettes without a fake ID, and vote, and stuff?
  • Me: No, not for another year, because you’re only 17 years old — but you have had 18 birthdays. Say, here come some of your friends. Use this bit yourself, if you want to, and have fun with it.
  • Student, to other students: Hey, guys, it’s my birthday! I’m 18 today!

…At least I try. Also, sometimes, the educational outcome is better than in this fictionalized example.

 

[Image source: http://www.decorationnako.tk/birthday-cake/]