Why Doesn't Earth Orbit alpha Centauri?

[Gawdzilla Sama]

I used to think I was a Capricorn until Carl explained precession.

Which Carl are you referring to and what book?

St. Carl of Sagan. He explained that the zodiac had rotated since the days the dates were laid out, resulting in a "one-off" error on everybody who is currently alive. 

http://www.livescience.com/4667-astrological-sign.html

You will most likely find that once precession is taken into account, your zodiac sign is different. And if you were born between November 29 and December 17, your sign is actually one you never saw in the newspaper: you are an Ophiuchus! The eliptic passes through the constellation of Ophiuchus after Scorpius.

Now you really have something cool with which to start that conversation!

Check out your “real” zodiac sign below and see what the sky looked like on your birthday by going to the Birthday Sky application.

Capricorn - Jan 20 to Feb 16
Aquarius - Feb 16 to Mar 11
Pisces - Mar 11 to Apr 18
Aries - Apr 18 to May 13
Taurus - May 13 to Jun 21
Gemini - Jun 21 to Jul 20
Cancer - Jul 20 to Aug 10
Leo - Aug 10 to Sep 16
Virgo - Sep 16 to Oct 30
Libra - Oct 30 to Nov 23
Scorpius - Nov 23 to Nov 29
Ophiuchus - Nov 29 to Dec 17
Sagittarius - Dec 17 to Jan 20