Question

Why is earth regarded as a unique planet

Answer 1

It’s in a solar system with irregularly spaced planets, something that doesn’t seem to be all that commonNot only that, the planets in its system have very different sizes - which also seems to be unusualEarth is - so far - the only world known to have solid, liquid, and gaseous water on its surfaceEarth’s moon is enormous, especially for such a small planetNot only that, but the Moon’s diameter is only about 1/4 the diameter of the Earth - that’s the second closest ratio of planet size to moon size knownEarth has a very strong magnetic field for such a small planetEarth has active plate tectonics - the only world currently known to have thoseEarth is the only known world with an oxygen-rich atmosphereEarth is one of only three worlds known to have dunes on its surfaceOf course, the Earth is the only known world that currently has lifeBecause of that, the Earth is a ridiculously strong radio source - in fact there are parts of the radio spectrum where the Earth is brighter than the Sun

Answer 2

Earth is regarded as a unique planet because it is proven that it has organisms living it.It supports us.Earth has adequate water resources,food and ambient temperature.We can't alter the fact may be there may be life on other planets.As we don't know any such planet Earth is a unique planet