A solid heavenly body which revolves around the Sun in a closed circular orbit is called a planet.
Star:
1. Stars have their own light.
2. Stars produce their own energy, due to the fusion of hydrogen.
3. Stars appear to twinkle at night.
4. Stars have enormous mass.
5. Stars do not change their relative position in the sky, every day.
6. Stars appear to move from east to west in the sky.
Planet:
1. Planets do not have their own light.
2. Planets do not produce their own energy. They have to depend upon the Sun for energy.
3. Planets do not twinkle at night.
4. Planets have insignificant mass, compared to the stars.
5. Planets change their position in the sky, on a daily basis.
6. Planets appear to rotate from the west to east in the sky.