The tallest mountain isn't in the Himalayas.
The highest mountain and volcano in the Solar System is on the planet Mars. Olympus Mons on Mars is the tallest.
It is 16 miles (24 kilometers) high which makes it about three times higher than Mt. Everest.
It's about two and a half times taller than Everest.
Olympus Mons is the highest mountain and volcano in the Solar System on the planet Mars.
It's a shield volcano covered in lava flows.