Solid Planets
Planets you could actually step on but you would die
Mercury
Mercury is the closest planet to the Sun, with a surface temperature that can range from extremely hot to freezing cold. It has a thin atmosphere composed mainly of oxygen, sodium, and hydrogen, making it unable to support life. Despite its small size, Mercury has a heavily cratered surface, similar to the Moon, and has the shortest orbital period of any planet, completing a revolution around the Sun in just 88 Earth days.
Venus
Venus is the second planet from the Sun and is often referred to as Earth's "sister planet" due to its similar size and composition. It has a thick, toxic atmosphere made mostly of carbon dioxide, with clouds of sulfuric acid, creating an extreme greenhouse effect and surface temperatures hot enough to melt lead. Venus has a retrograde rotation, meaning it rotates in the opposite direction of most planets, and its day is longer than its year, taking 243 Earth days to complete one rotation.
Earth
Earth is the third planet from the Sun and the only known planet to support life, thanks to its liquid water, breathable atmosphere, and moderate temperatures. Its surface is about 71% water, with vast oceans, and the remaining land consists of continents and islands. Earth has a protective magnetic field and atmosphere that shield life from harmful solar radiation and space debris, making it unique in our solar system.
Mars
Earth is the third planet from the Sun and the only known planet to support life, thanks to its liquid water, breathable atmosphere, and moderate temperatures. Its surface is about 71% water, with vast oceans, and the remaining land consists of continents and islands. Earth has a protective magnetic field and atmosphere that shield life from harmful solar radiation and space debris, making it unique in our solar system.