Do you want the returne of the Solar System?

[Hielor]

it's a huge ice cloud surrounding the sol system, even if the sun exploded, there would be a remnant (be it white dwarf, black hole, pulsar, neutron star, whatever), and both the cloud block and the gravity well would keep a big portion of the matter in there.

Aside there would be a huge nebula or debris if it really exploded like in O41.

You apparently misunderstand the concept of "escape velocity." Look it up.

The Oort cloud is not a blanket that will somehow magically stop everything coming through it. It's rather sparse--things could easily pass through it.

Ok, Hielor, pointing at a video and talking about the surface area of jupiter has nothing to do with the physics of a cosmic explosion. Unless the sun is throwing out huge chunks of mass in all directions itself, any resultant explosion of a planetary body will be isotropic -- equal amounts of matter will be thrown toward the epicenter of the blast and away from it. Even if another planetary body that exploded sent a fragment into Jupiter with enough energy to actually split a solid planet, Jupiter is a gas giant which is already held together by its own gravity. Large objects colliding with Jupiter at high speeds would probably leave a small tear and pass through it.

The center of mass of the system remains unchanged unless the superweapon manages to apply some force to the system-- and even so, the entire system would be moving in one direction if that were the case.

It's fairly evident from your statement that you have not watched the video. The video that I linked to is the one we're talking about--it's the canon background for Discovery. Watch it.

Moving on, planets don't explode from the inside (which is what would cause an isotropic explosion). It's not even really exploding, as you can see from the video--it's having pieces of it pushed off by the explosion of the star, all of which will be *away* from the center of the explosion (which was the star).

The center of mass of the system doesn't matter when most of the matter in the system is moving outward at faster than escape velocity, because it's not going to come back--it's going to leave the system.