The composition of a dust nucleus can vary, but it is typically made up of small particles of solid material, such as silicon, carbon, and iron. These particles can range in size from a few nanometers to several micrometers.
Gravity plays a significant role in determining the shape of a dust nucleus. As these particles are pulled together by gravity, they can form aggregates or clumps, which can then continue to grow in size and change their shape as more particles are added.
Yes, the shape of a dust nucleus can change over time. As more particles are added to the nucleus, it can grow and change in shape. Additionally, external factors such as collisions with other particles or radiation from the sun can also alter the shape of a dust nucleus.
The speed of rotation can have a significant impact on the shape of a dust nucleus. As the nucleus rotates, the centrifugal force generated can cause it to become elongated or flattened, depending on the direction and speed of rotation.
Aside from gravity and rotation, other factors that can determine the shape of a dust nucleus include temperature, pressure, and the chemical properties of the particles that make up the nucleus. These factors can all influence the growth and evolution of a dust nucleus, ultimately shaping its final form.