u/Defiant-Button6510

Hey all - I have explored every planet and moon at this point but I don’t understand efficiency with the rockets/engines. Is there a good resource to help explain this? I always build mega monstrous giganto ships that cost in the millions to launch. But it looks like people can make it to the outer planets and back with much less. I like the big heavy engines because mo powah baby - but I know this isn’t ideal. I’m trying to understand which engines are the most efficient and how I can tell - not just which are the lightest.