The ellipses of some planets, the earth and Venus for example, are hardly eccentric at all and it is hard to distinguish them from circles. Others, such as Mercury or Pluto, have rather eccentric orbits and so their ellipses are considerably more elongated.
The planets nearer the Sun are fairly close together whereas the
spaces between Jupiter and the planets beyond become larger and larger.
The speeds at which the planets move in their orbits round the Sun differ a great deal.
All move fastest when closer to the Sun and slowest when further away.
The sizes of the bodies in the Solar System vary widely too. Jupiter is very large, with a diameter 11 times that of Earth's, yet even it is only a tenth the diameter of the Sun, which is vast.
