What is The fourth planet from the Sun?

The fourth planet from the Sun is Mars, and it’s like a red cousin to Earth.

Imagine you're playing a game where you count your friends as they line up in order of how far away they are from you, that's kind of what happens with planets. The Sun is like the friend who starts the line, and the first planet is Mercury, then Venus, then Earth, and finally Mars comes next.

If Earth was a bright green marble, Mars would be more like a rusty red rock you might find in your backyard after it rained. It has big mountains and deep canyons that are bigger than anything on Earth. Sometimes, from our planet, we can even see Mars shining bright in the sky at night, kind of like how a streetlight shines when you're walking home.

People have sent robots to visit Mars, and they've found signs that there might have been water long ago. It’s not as warm as Earth, but it's still a cool place to imagine living on, especially if you like the color red!