# Equation tag not showing

Sorry, real noob here... I just need to typeset the following equation. I found a way to split the too long equation into two lines, but now it does not typeset/give equation tag: why?

\begin{equation*}
\begin{aligned}
W [ & \text{inverse distance attraction} \\
& \mid \text {elliptic orbits and the "second law"}] \approx 1 \label{a3}
\end{aligned}
\end{equation*}


I am using TeXShop on Mac Os X.

• Welcome to TeX.SE.
– Mico
Apr 28 at 10:19
• Please not that in 99% of all latex questions, the editor is irrelevant Apr 28 at 12:57

The equation* environment is untagged. Drop the asterisk and use equation instead.

• Yes, thanks thats it!!! Apr 28 at 9:48

I guess that you only need to remove the asterisk in the begin and end equation:

\begin{aligned} W [ & \text{inverse distance attraction} \\ & \mid \text {elliptic orbits and the second law''}] \approx 1 \label{a3} \end{aligned}


Also, don't use the character ", called dumb double-quote marks, for typestting; use  to open the quote and '' to close.

• Yes, thanks thats it!!! Apr 28 at 9:48
• +1. I've taken the liberty of adding a sentence to your answer, to point out that one shouldn't use "dumb" (1"`) quotation marks in a LaTeX document. Feel free to revert.
– Mico
Apr 28 at 10:25