you see my image this. I think revealed proof SSTV Signal Pyramid in the Duna this... Really top secret it's a SSTV Signal Pyramid.
SSTV Signal Pyramid explain things (topleft-topright) :
LOGO = KSP logo have rockets emit light fire.
IKE = you can see it's Ike moon in the Duna.
4 KERMAN ASTRONAUTS = left-right, Jebediah Kerman, Bill Kerman, Bob Kerman and Valentina Kerman. not sure it was not an alien but kerman is an alien?
SECRET SATELLITE = unknown, I don't know what it's a weird object (right-top).
MOHO, EVE AND KERBIN = there's 3 planets but you can see 3 planets.
SSTV'S PYRAMID = it's a hill shaped-like pyramid there's noise sound. so, you really sick your ears with headphones.
DUNA! = you know this Duna is red planet in the Kerbol System.
*oops, I forgot wrong it's numbers. just fixed : 'start 1 -> 2 -> 3 -> 4 finish'
Notice : Sorry, I seriously meticulous reveal what it.