So I’m exploring portal travel. I thought I read somewhere that you were restricted to the destination planet, so you couldn’t short-cut the journey to the centre, but apparently not; your star ship is transported with you.
I managed to warp to another system after using a portal, but couldn’t return because my hyperdrive engine wasn’t capable of warping to the destination star colour!😱 Luckily, I’d saved the game beforehand!
p.s. You cannot redial a portal once used, only return.