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s status as a planet, the classical theory of nine planets in the solar system would have had to be changed, but the other way around.

The earth is one of the nine planets. All nine planets go round the sun the same way. Each of them also turns on its own axis.

Pluto, Eris and the many other Kuiper Belt objects are far too different to be lumped in with the eight official planets, he said.

They thus have sine waves with large amplitudes and short wavelengths, both of which make them easy to see.

During the next few million years, lumps of that disk stuck together to form the familiar eight planets of the modern solar system.

They complained in reviews on the company's website that the sun, the eight planets and Pluto would often just not stay inflated.

There are eight planets, at least thirty moons, and thousands of asteroids to be explored.

It is a sphere that revolves around the sun as part of an eight planet solar system.

The earth is one of mine planets which move in orbit round the sun.