In our solar system, gas giants are much bigger than terrestrial planets, and they have thick atmospheres full of hydrogen and helium. They both orbit the sun. Terrestrial planets are similar to Earth made up of mostly rock and have few moons. Gas giants are made up of gas and have a lot more moons. Some of the surface of mercury featured is craters, ridges, and terrains ranging from heavily cratered to nearly crater free. These features help us to understand the evolution of the planet. Mercury’s core has more iron than any other planet in the solar system. Scientists think this had to do with its formation and early life. Venus is closer to the sun, but distance alone isn’t enough to account for the different conditions on this planet. Water
