Hello, I've just started playing KSP and was wondering, "What the heck does 'delta V' mean?", "Why is the Eve landing so hard?", "Why are Kerbals so stupid?", "How did KSP become so awesome?", "How the heck are you supposed to dock a ship?", "Why is Jeb so awesome?", "How do people make such huge, impressive ships?", yada yada yada. A rundown of nearly all the elements in KSP wouldn't go amiss here, so feel free to make walls of text as far as the eye can see! This is meant for everybody to answer, as well. If you see someone with the same answer as you, but the two answers are worded differently, feel free to go ahead. The more text, the better.