no it isn't the earth is a little flattened around the poles
A circle is a two dimensional object. I think you mean are they spheres. In general, They are, but not perfect spheres. The equators bulge out slightly
The moon circles around the earth; the earth circles around the sun.
The moon orbits the Earth, which orbits the sun.
the earth circles the sun while the moon circles the earth
the earth is a bit flattened but the moon has a brilliant circle
The moon circles the earth...
the earth is a bit flattened but the moon has a brilliant circle
not quite. The moon circles the Earth, which circles the sun. So the moon's orbit around the sun isn't a smooth track, but consist of a wave like pattern.
As the moon circles the Earth, the shape of the moon appears to change; this is because different amounts of the illuminated part of the moon are facing us. The shape varies from a full moon (when the Earth is between the sun and the moon) to a new moon (when the moon is between the sun and the Earth).
The body that circles the Earth is called the Moon.
Basically because the moon revolves around the earth so therefore it circles the sun to. It doesn't orbit it but it does go around it.
The moon circles the earth once every 28 days approximately. It keeps the same face towards the earth at all times and so as it circles the earth this means that, relative to the sun, it rotates once on its axis in this time. Therefore the moon shows its rear side towards the sun when it is a new moon (and the face of the moon facing earth is dark), and its earth-facing sun towards the sun when it's full moon (and the moon is bright). This new moon and full moon cycle lasts once every fourteen days. Therefore the moon's night is 14 earth days long, and its day is also 14 earth days long.
The moon does not circle the sun directly, it circles the earth. so it would be approximately the same as how long the earth takes, about 365 days.