MERCURY
The closest planet to the Sun
It is an intriguing world with some of the most extreme conditions in our solar system.Mercury’s surface is covered in long, curving cliffs called scarps, some stretching hundreds of kilometer. These features formed as the planet’s core cooled and contracted over time.
Polar Ice
Despite its scorching daytime temperatures, Mercury has water ice hidden in
permanently shadowed craters at its poles. These areas never receive sunlight, allowing ice to
persist, likely brought by comets or formed by solar interactions over time.
Internal Structure
Although Uranus and Neptune don’t have icy surfaces, the term "ice giant"helps
differentiate them from gas giants because they have more “volatile” materials in their
composition.
