Yes and No
They are in their own orbit
No they each have its own orbit around the sun and they do not collide
As the planets orbit the sun, its gravity keeps them from colliding
the gas planets are bigger than the rocky planets
Yes, planets would be much bigger.
Unless they turn into meteorites, and collide with the planets, pretty much not at all.
well some planets are bigger than the earth but from the inside earth is of course bigger than all of the other planets
Four: Jupiter, Saturn, Uranus and Neptune.
Planets around the sun in nearly circular orbit . The radii of these orbits differ widely
The distance of the planets from the sun does not change because of the gravity surrounding each planet is pulling them into continuous orbit.
because when god made the planets he made explosions everywhere to make planets. some explosions were bigger than others.
(well in pics) but it really wont happen because earth is like a big magnet but the gravitational pull will not let the other planets collide with the earth or (even the sun) some say !!