Planet
The Spanish word 'planeta' translates to 'planet' in English. It's used in the same context as in English, referring to any of the large solid objects that orbits a star (like the Earth around the Sun). It is a noun in Spanish as it is in English. The pronunciation in Spanish is slightly different, pronounced as 'plah-net-ah'.
The planet Earth is the third planet in the solar system.
This statement expresses a basic astronomical fact, indicating the position of Earth in relation to other planets in our solar system.
There is life on our planet because it has water and an atmosphere.
This sentence talks about the conditions necessary for life as we know it, namely the presence of water and an atmosphere. These factors enable the existence and survival of various life forms on Earth.
Mars is known as the red planet because of its appearance.
This statement refers to Mars' nickname, 'the red planet'. Mars is often called this due to its reddish appearance, which is caused by iron oxide (more commonly known as rust) on its surface.