I have been exploring the planet and I came across this weird looking purple structure with stars and stuff on it. There is an input on the main platform. I got an achievement for finding it, says that this thing is called a gateway chamber. What is it and what does it do?
Gateway chambers are used for something pretty cool. I do not really want to spoil it for you but they will allow you to teleport places. If you want to find the answer to it all now, this guide will explain everything about gateway chambers. If you want to find out for yourself, start digging to the centre of the planet.