The name for our planet's shape is an 'oblate spheroid', which is like a sphere squashed slightly in one direction (like if you press down on a soccer ball on the floor; Smarties are also oblate spheroids but squashed down a lot more than the earth.) If the earth didn't spin around once a day it would be a sphere since gravity has been working long enough on the planet, and it pulls all parts of the planet inwards equally so eventually it ends up mostly spherical (after some stages in the evolution of the solar system). But since it also spins, the centrifugal force is greatest around the equator, so it pulls the middle of the earth out slightly into a bulge. I may be wrong, but i think this is a characteristic common to all of the planets in the solar system, maybe barring Uranus, since its axis of rotation points towards the sun. Hope this helps ;)
From Dr Octavian.
It is correctly described as a geoid, which a slightly circular description, but the closest simple shape that describes it is an oblate spheroid, that is an ellipse rotated about its minor axis.
In simple terms it's (almost) a sphere.
Earth's Shape Is A Circle. Of Course Everyone Knows That.
Oblate spheroid, having both flat poles.
The earth is an oblate spheroid.
Spherical
They would be considered as 'spherical' celestial bodies. round
yes, the earth and other planets revolve around the sun
All the planets in the solar system are kept in orbit by the gravitational pull of the sun. The effect of the other planets and other bodies in the solar system is to change the shape of the orbits slightly but the sun is what keeps them in orbit around the sun.
Earth and the other planets are mostly made of rock.
The actual shape of the earth's orbit around the sun is horrendously complicated. Partly because the earth does not orbit the sun and also because the orbit is influenced by the the gravitational attraction of the other planets. The earth does not orbit the sun: the centre of mass of the earth-sun system is at one of the foci of an ellipse whose eccentricity is 0.0167. The eccentricity varies from 0.0034 to 0.058.
sphere
the sun earth and the remaining planets are roughly spherical in shape.
They would be considered as 'spherical' celestial bodies. round
yes, the earth and other planets revolve around the sun
All the planets in the solar system are kept in orbit by the gravitational pull of the sun. The effect of the other planets and other bodies in the solar system is to change the shape of the orbits slightly but the sun is what keeps them in orbit around the sun.
we would die if the sun burned out. so yes it is important to earth and the other planets
The Sun and its planets are all basically spheres. The earth is an 'oblate sphere' - that it, it is flattened at the poles.
earth and all the other planets
http://solarsystem.nasa.gov/planets/profile.cfm?Object=Sun&Display=Facts
Earth and the other planets are mostly made of rock.
Earth and the other planets are mostly made of rock.
The SHAPE of the orbit the Earth and most planets and other bodies of mass in space are usually elliptical.