All About the Planets

Our solar system is home to eight amazing planets. Some are small and rocky; others are big and gassy. Some are so hot that metals would melt on the surface. Others are freezing cold.

We're learning new things about our neighboring planets all the time. We send spacecraft to take pictures, gather information, and find out more about them.

Do you want to know more about our solar system's eight planets? Click a planet on the sidebar or choose from below to get started.








Planet Merit Badges

On each planet page, you can click planet badges to learn more about that planet.

Here is what each badge means:



a merit badge that shows a small cirlce in the middle indicating a small planet

The smallest planet

a merit badge that shows a large circle in the middle indicating a large planet

The biggest planet

a merit badge that shows an orange planet horizon and a moon in the background

A planet with moons

a merit badge that shows an orange planet horizon with no moon in the sky

A planet with no moons

a merit badge with orange wavy heat lines

The hottest planet

a merit badge with bands of blues indicating cold weather

The coldest planet

a merit badge with an orange planet and a thick blue band above it

A planet with a thick atmosphere

a merit badge with an orange planet and a thin blue band above it

A planet with a thin atmosphere

a merit badge that shows a planet with a rocky surface

A terrestrial planet

a merit badge has bands of yellow and blue showing a general gas giant

A gas giant or ice giant

a merit badge with a planet and an arrow encircling it, showing rotation

The length of 1 day

a merit badge with a sun and an arrow encircling it, showing revolution around the sun

The length of 1 year

a merit badge with a purple ring in the center

A planet with rings

a merit badge with a volcano spewing lava

A planet with volcanoes

a merit badge with a hand pointing to a circle in the sky

The year the planet was discovered

a merit badge with an ancient symbol

A planet we've known since ancient times

a merit badge with a vertical rounded arrow

A planet that rotates on its side

a merit badge with a horizontal arrow showing clockwise rotation

A planet with a reverse spin

a merit badge with a tree

A planet that has living things

a merit badge with a simplified spacecraft made of a square and two rectangles

How we've explored the planet

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