gravity of course
It is gravity that holds the planets in their orbits around the sun. Gravity is what gives "shape" to the solar system, to galaxies, and is the large-scale organizer of the universe as a whole.
Gravity plays an important role in maintaining the shape of the solar system by keeping the planets in their orbits around the Sun. The gravitational pull of the Sun is what keeps the planets moving in their paths without drifting off into space.
The gravitational force between the sun and the planets keeps them in orbit. This force acts as a centripetal force that continually pulls the planets towards the sun, keeping them in a stable orbit. The balance between the planet's velocity and the gravitational force determines the shape and size of their orbits.
Gravity is the force that keeps celestial bodies in orbit around the Sun. The gravitational pull of the Sun keeps planets moving in their elliptical orbits, maintaining the overall shape of the solar system. Without gravity, the planets would not stay in their stable paths around the Sun.
The skeletal system gives the body shape and strength.
That would be the gravitic force, or you could say 'the force of gravity'.
All planets in our solar system have elliptical orbits.
The planets orbit the Sun in near-perfect circles, but they are actually ellipses. This is because that although the Sun contains much more mass than the planets in our solar system, the planets pull the Sun slightly, which by definition creates an elliptical orbit.
All the planets in our solar system share the characteristic of orbiting the Sun due to its gravitational pull. They are also spherical in shape, formed by the force of gravity pulling matter into a round configuration. Additionally, they all have cleared their orbits of other debris, classifying them as planets rather than dwarf planets or other celestial bodies.
The size of the planet along with the gravitational force within the planet.
Gravity is the force that keeps the planets in their orbits around the sun. It pulls the planets towards the sun, while their forward motion keeps them from falling into it. Gravity also influences the shape and stability of the planets' orbits.
The solar system is roughly a flat, disk-like shape, with most planets orbiting the Sun in relatively the same plane. This configuration is due to the way the solar system formed from a rotating cloud of gas and dust, which flattened out into a disk as the planets formed.