That isnt blatantly obvious? hmmmm... SSTO = Single Stage to Orbit (dont drop anything) DeltaV = how much velocity change you have in fuel stores MechJeb = autopilot that can do most things, and somewhat teach you (IMHO it is needed, but that gets contentious) GrandTour = visiting every planet and moon with a mothership that has multiple landers and what not on it (difficult) Reputation = the little star in the lower right hand portion of the post, click on it if you like the post, similar to a like on facebook, but semipivate, can be seen in the green bars below the user's name BBCode = the special code that can be used to do a variety of things in posts (http://forum.kerbalspaceprogram.com/misc.php?do=bbcode) Hohmann Transfer = an interpletary transfer method (http://en.wikipedia.org/wiki/Hohmann_transfer_orbit) Mods = modifications... some that i recommend; Mechjeb(http://kerbalspaceprogram.com/mechjeb/), Taverius Aerospace (http://kerbalspaceprogram.com/0-18-1-taverios-pizza-and-aerospace/), B9 aerospace (http://kerbalspaceprogram.com/0-19-1-b9-aerospace-pack-release-2/), KW Rocketry(http://kerbalspaceprogram.com/0-18-1-kw-rocketry-overhauled/), KerbX (im a tester, http://kerbalspaceprogram.com/0-18-2-kerbx-a-spacex-analogue-falcon-1-released/), beware mods generally make the game take longer to load and anything else just ask the community is one of the nicest forums on the internet, thanks to the mods and people just being polite, Have Fun, B787