1, with different properties.

A star is a giant sphere composed of luminous plasma, while the planet itself does not emit light, and its mass is similar to that of a sphere.

2. The hierarchical relationship is different.

Stars rotate and planets revolve around them.

3. Rotation and revolution are in different directions.

The rotation and revolution directions of stars and planets are different, and its revolution direction is generally the same as that of surrounding stars.

4. Different energies

Stars will carry out nuclear fusion reaction at the core, then transfer energy from the inside to the outside, and finally radiate to outer space, while the planet itself will not carry out nuclear fusion reaction like Hengxin.

The reason for the planet:

Planets are formed by stars.

Nebulae in the universe are called "star-making workshops", which are celestial bodies gathered by a large number of interstellar dust and other substances. When the nebula is disturbed, the balance among interstellar dust, molecular clouds and other nebula substances in the nebula will be broken, and the nebula substances will converge due to gravity, and the dust at the center of gravity will be under increasing pressure. At the same time, gravitational potential energy will be converted into thermal radiation to delay this convergence process (this process is called accretion).