Terrestrial planets are rocky planets that are similar in composition to Earth. They are also known as inner planets, and include Mercury, Venus, Earth, and Mars.
Planet | Diameter (km) | Distance from the Sun (AU) | Surface Temperature (°C) |
---|---|---|---|
Mercury | 4,880 | 0.39 | 430 to -180 |
Venus | 12,104 | 0.72 | 462 |
Earth | 12,742 | 1.00 | 15 |
Mars | 6,779 | 1.52 | -87 to -5 |
Terrestrial planets formed closer to the Sun where the solar nebula was hotter. They are mainly composed of rock and metal, and have solid surfaces. The process of their formation involved accretion of smaller particles and planetesimals, leading to the formation of the rocky planets.
Studying terrestrial planets provides valuable insights into the formation and evolution of rocky planets, and helps in understanding the conditions necessary for the development of life.
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