The star Murune and it's three planets have long been contained within an impenetrable barricade. As such, the announcement by God-Empress Hirune that she was going to be opening a portal somewhere where they can explore and meet people around new stars comes as a complete but welcome surprise. There's a mad scramble as the ship pilots and astronomers are gathered up.
The portal opens, a massive circular gate in an empty patch of space beyond the farthest planet. Unfamiliar stars can be seen from the other side.
In the name of caution, a mechanical probe is sent through first.