Block environment with empty title in Beamer: how to reduce empty space at the top

Question

I'm using the LaTeX beamer class to write a presentation. I'm placing vertically aligned equations inside a block environment without a title. When I do this, I get extra empty space at the top of the resulting block, before the first equation begins. Here is a minimal working example (MWE) that illustrates my problem

\documentclass[]{beamer}
\mode<presentation>
{
\usetheme[secheader]{Boadilla}
}
\usepackage[english]{babel}
\begin{document}
\begin{frame}
\begin{block}{}
\begin{align*}
Eq1&=0\\
Eq2&=0
\end{align*}
\end{block}
\end{frame}
\end{document}

With the above code there's more empty space before the first equation than there is after the last one. Is there a way of vertically centering the aligned equations inside the block so that there is an equal amount of empty block space left above and below the equations? Moreover, can one specify exactly how much empty space? Thanks a lot in advance!