From the time long, long ago when They decided to leave...
Inspired from the song "Goodbye Milky Way" by Enigma:

"Shall I go, shall I stay
107 light years away
many times, so many doubts
But no reason to talk about

Mission is over, mission is done
I will miss you, children of the sun
But it's time to go away
Goodbye milky way

For a better world without hate
Follow your heart, believe in fate
Only visions and the mind
Will guide you to the light

Mission is over, mission is done
I will miss you children of the sun
I go home until someday
I say goodbye, goodbye milky way

In 5 billions years the Andromeda galaxy will collide with our milky way
A new gigantic Cosmic world will be born"

Photoshop CS2, way to many hours, I had a really hard time to finish it, I found out what I wanted to do thanks to the song.
Thank you for looking!