TITLE: Decipher the greeting card $( X^2 +Y^2 -1 ) ^3 - X^2 Y^3 = 0$
QUESTION [18 upvotes]: A friend of mine just got a rather weird congratulations card through the door 

They have zero idea what it means, I have tried graphing it and nothing spectacular comes out. Is there a standard name for this equation or does it signify anything?
Any help would be appreciated.

REPLY [11 votes]: Using Maple it is:
 [> with(plots):
    implicitplot((x^2+y^2-1)^3-x^2*y^3 = 0, x = -10 .. 10, y = -10 .. 10);