Roughly. Anything that spins for incredibly long periods of time (I.E Billions of years) Natuarally becomes spherical, But if you want to be so incredibly accurate, No. Because of all the gaping holes and perilous mountains ect.
because they are all spheres!
No but they are of a spherical shape
The Sun, Earth and the Moon are all oblate spheroids. Meaning their equatorial diameter is greater than their polar diameter.
Yes.
Centripetal Force.
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
Of Earth's four major spheres atmosphere, hydrosphere, and biosphere are absent or nearly absent on the Moon. This prevents many of the natural processes we see on Earth from happening on the Moon.
sun earth and moon
Spherical. They are approximately spheres. The earth is more of an oblate sphere, a squashed sphere - this is due to its spin.
Venus and Mars
Sun, Earth, Moon. The moon is covered by the Earth's shadow.
sun, moon, and earth Lergest to smallest: Sun, Earth, moon