2 planes that I havent seen before. Can anyone help?

[Kieran Wells]

Was driving along qantas drive this afternoon on the way to Sheps mound and the old ATC to do some spotting, and came across 2 planes i have never seen before, and they didn't have titles. Obviously, i wasn't able to stop so i'll try and describe them.
The first ones tail was all blue and had stars almost in the form of the EU flag on it in a lighter blue. The body was all white. This was parked with the BA 777 and 744.
The second one was just a bit further round near the qantas hangar and was all white. the tail was white and had some blue insignia on it. From a glance it looked more like a "aquarian" star sign symbol??? Didn't see a flag or rego on it..