The sun does because it's light reflects off the moon. The more light reflected the bigger the shape. The less light reflected, the smaller the shape.
Sedimentary
Mars has two moons, Phobos and Deimos. These moons are irregular in shape and are thought to be captured asteroids. They orbit close to the planet's surface compared to other moons in the solar system.
Saturn is known to have shepherd moons. These moons are small natural satellites that help shape and maintain the distinctive rings around the planet by interacting with the ring particles through their gravitational influence.
The two unusual moons of Mars are Phobos and Deimos. Phobos is the larger of the two and has a irregular shape resembling a potato. Deimos is smaller and has a shape that is also irregular, but more like a lumpy potato.
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No they are not
Mars' moons are much smaller than, for example, Earth's Moon, or the larger moons of Jupiter. A large moon will have a larger gravity, which will tend to pull the moon together into a spherical shape.
It have two moons
Your question makes no sense.
Some planets in our solar system with two or more moons include Jupiter (79 moons), Saturn (82 moons), Uranus (27 moons), and Neptune (14 moons). These moons vary in size, shape, and characteristics, and they play important roles in the dynamics of their respective planet's systems.
Moons are inaminate, therefore nothing about them can be meant. Please revise your question because it makes no sense.
The Earth's and Moon's rotation.
Sedimentary
No. Only the larger moons are spherical. Smaller moons do not have strong enough gravity to make themselves round and so are irregular in shape. Perfect example are Phobos and Deimos, the two tiny moons that orbit Mars.
No. Jupiter's smaller moons are irregular in shape.
Mars has two moons, Phobos and Deimos. These moons are irregular in shape and are thought to be captured asteroids. They orbit close to the planet's surface compared to other moons in the solar system.
Since all of the planets, and moons, and stars seem to have a spherical shape, it is possible that the universe may be a sphere.