Jupiter and Saturn

[Fallingstar1971]

If these two worlds collided, would they form one planet or just send pieces of one another flying all over the solar system?

Star

 

[origin]

I guess it would depend on the angle of approach and the relative velocities. Of course this can't acutally happen.

 

[3488]

Most likely they would merge to form a 413 Earth Mass Jovian world, a denser Jupiter sized world (Jupiter is close to the size to when extra mass would not increase size, but density).

Origin is correct though, it ain't gonna happen.

Andrew Brown.