Ganymede

In 2010 a message was received by astronomers of Xpace that came directly from one of Jupiters' moons, known by the name Ganymede. After a long time of investigation, the message could not be decrypted with our primitive technology. We sent another message in morse code requiring a reply, and after some time we got an answer: "We are not  talking to you".  Your mission is to pilot a rocket called Ealge8 to investigate this mystery!