Let $X$ be an Artin stack over the complex numbers.  What can one say **analytically locally on the coarse space $\left|X\right|$** about the structure of $X$?  For example, can one say that $X=U/G$ where $G$ is an algebraic group acting on a scheme or complex analytic space $U$?  I actually suspect that this is false, and that a counterexample is given by the moduli stack of nodal genus zero curves (I don't see how to construct such a neighborhood around $\mathbb CP^1\vee\mathbb CP^1$).  If it is indeed false, what is the best one can say?

A related question: https://mathoverflow.net/questions/346149/stacks-as-local-quotients-or-via-atlases