What are the similar characteristics of all the nine planets?

The IAU defines a planet as “a celestial body that: (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. read more

The other similar characteristic they all share is that they’re made of baryonic matter rather than dark matter. Off the top of my head these are the only four characteristics all eight planets share. read more

All the other planets have densities higher than water and would sink like a rock. Lesson Summary. I hope this lesson taught you some cool facts about the planets and their characteristics when compared to one another and Earth. The planets in the solar system revolve in a counterclockwise fashion. read more

These are the nine planets and their basic characteristics. I will write about how their differ from each other. Mercury: Mercury is the closest planet to the Sun. Venus: Venus is the hottest planet in the Solar System. Earth: Earth is the only known planet with life. Mars: Mars is red in colour. read more