The different features consist of size, amount of moons, rings, and orbit speed. They are the same, however, because they all orbit the sun, have a core, are round, and have gravity. The planets are truly amazing things in space.Click to see full answer. Regarding this, how are all planets alike?All of the planets in the solar system rotate and orbit the sun. The planets are alike because all the planets are made up of the same things like rocks and ice. All of the planets are also alike because they all orbit something. Not all the planets are similar to each other.Likewise, which planets have the most in common? Jupiter and Neptune Mercury and Venus Mars and Uranus Earth and Saturn. Hereof, what do the inner planets have in common? The four inner planets — Mercury, Venus, Earth and Mars — share several features in common. Astronomers call them the “terrestrial planets” because they have solid, rocky surfaces roughly similar to desert and mountainous areas on the earth.What common characteristics do all planets share?The terrestrial planets all have rocky surfaces that feature mountains, plains, valleys and other formations. The temperatures of the inner planets are low enough that rock exists mostly as a solid at the surface.