>>7533640It is quite possible, actually, that because of the immense vastness of space these advanced species that reached the technological level of manipulating gravity in such a way that it transforms the very fabric of space are just passing by us in their intergalactic, and possibly, in thir interdimansional travels.
Just a picrelated as well. Earth, in comparison even just with Solar system, is almost exactly 1 'million' times smaller. So even traveling from Pluto you'll have to be VERY precise, to say the least, to reach even close to Moon's orbit, not to mention close enough to be detected and observed from the Earth.
And the nearest star - again, the 'nearest' star, one of more than 100 'billions' of them just in our galaxy - is more than 3,384 times further.
And then there's cloaking technology - to possibly keep it away from any unnecessary attention - that will be just a second's thought for a lifeform this advanced.