EARTH & MOON

well everybody loves moon. don't they? but do you know what makes our earth and the moon in our solar system special?

well as all know there are 8 planets in our solar system, and most have  moons, but there is something special about the earth and it's moon.

   The fact that there is life on earth is one important factor that makes it special,but there is another- astronomical reason as well.

   And that is "NO" other planet has such a large moon relative to the planet's size.This is why some scientists don't consider the earth and it's moon to be a typical planet moon system,but prefer to think of it as a "DOUBLE PLANET".