Ok, let's clear this up. I am generalizing in an attempt to keep it simple.
Those Hubble photos are being given the 'miniaturize' look I mentioned in my reply.
They are NOT Tilt-Shift pictures. Those Hubble pics are labeled incorrectly.
You can use photoshop to miniaturize any photo and to fix the perspective and the like. This is what happened to those pics.
Making a band of focused area with unfocused area everywhere else is what was done to those Hubble pics.
Medium and large format cameras typically have a tilt-shift lens and can, on camera, fix perspective and other planar adjustments. The results are tilt-shift photos. Though they aren't usually labeled as such.
There is a fad to take pics and video and give them the miniaturized look. Much like HDR, if done incorrectly they look like shit.
Everything in moderation.
ByteTheBullet (-: