Unicron surprise makes no sense

This movie makes about as much sense as its clunky name.. 'THE Transformers THE Movie' - who the heck thought that's perfect?

It has its moments, of course, but all the criticisms are valid and spot-on.

However, the nonsensical part starts RIGHT at the beginning! That's pretty thoughtless, isn't it?

I mean, look at the size of that thing - Unicron is more massive than Death Stars combined! Fine, I didn't measure it, but let's just say it's bigger than a regular-sized planet, and leave it at that.

How far can we, with our primitive tech (compared to the advanced robotic race's futuristic tech) see into space? Hubble deep space photos are pretty impressive, showing how space just doesn't end, there are more and more galaxies no matter where or how deep you scan.

Now, combine these two facts and you should come to a solid realization; Unicron shouldn't be able to surprise any population, every single planet should be able to evacuate WAY before Unicron arrives.

We can see objects that are 2500 light years away with a naked eye.

If our primitive telescopes and satellites can see.. well, it's too cumbersome to research right now, but let's just say 'pretty darn far'. There's all reason to logically assume that a civilization of AI robots should be able to see much further than we do.

How can Unicron be a sudden surprise, unless it teleports, manifests into a solar system, or uses some kind of cloaking device?

Even more primitive populations of planets should be able to see that thing a long time before it actually arrives, unless it uses warp speed or something.

How is anyone surprised and horrified that this planet-eating monster is suddenly right next to their planet? (I have already earlier mentioned how disregarding laws of physics and the scale, size and mass of those enormous objects also makes no sense, but whatever, it's a cartoon, I guess)

It makes no sense that Unicron can make people so horrified and surprised, when they should be very well prepared for its arrival every time, considering they should be able to see and track it from probably thousands of light years away.

Great start..