Let $\mathbb{R}^d$ be a D816: Euclidean real Cartesian product.
Let $\mu^*$ be the D780: Lebesgue outer measure on $\mathbb{R}^d$.
Let $\mu^*$ be the D780: Lebesgue outer measure on $\mathbb{R}^d$.
Then
\begin{equation}
\forall \, E \subseteq \mathbb{R}^d : \forall \, x \in \mathbb{R}^d : \mu^*(E + x) = \mu^*(E)
\end{equation}