* Mercury: The smallest and fastest planet, known for its extreme temperature fluctuations.
* Venus: The hottest planet, with a thick atmosphere of carbon dioxide.
* Earth: Our home planet, with liquid water and a diverse biosphere.
* Mars: The "Red Planet," known for its rusty surface and potential for past life.
Key Characteristics of Inner Planets:
* Rocky Composition: They are primarily composed of rock and metal, with a solid surface.
* Smaller Size: They are significantly smaller than the outer planets.
* Higher Density: Due to their rocky composition, they have a higher density than the gas giants.
* Fewer Moons: Inner planets generally have fewer or no moons compared to outer planets.
* Weak Magnetic Fields: Their magnetic fields are generally weaker than those of the outer planets.
Differences from Outer Planets:
* Composition: Inner planets are rocky, while outer planets are gas giants (composed mainly of hydrogen and helium).
* Distance from Sun: Inner planets are closer to the Sun, receiving more solar radiation.
* Temperature: Inner planets have higher surface temperatures compared to outer planets.
* Atmospheres: Inner planets have thinner and less substantial atmospheres than outer planets.
