You actually have the menu url action setup correctly, but you need to add the planet dim in your url like Daniel said.
However, because you have responsive tooltips on, you have to click on the arrow to display the menu link. You can change your tooltip to on hover to show the link immediately when you hover over the arrow.
If you want the action to trigger on a click, you just need to change it from menu to select.
You just needed to add the distance from the sun dim to your planet sheet and then edit the tooltip.
9.2 workbook attached.
Planets.twbx 139.7 KB