Olympus Mons on Mars, the tallest planetary mountain in the Solar System, compared to Mount Everest and Mauna Kea on Earth. Resident Mario on Wikimedia Commons ...

The massive Olympus Mons volcano on Mars—one of the solar system’s highest peaks—may have towered above a Martian ocean in the distant past, a new study suggests.

Olympus Mons is some 3.5 billion years old, which means the volcano formed early on in Mars’ history. Astronomers suspect Olympus Mons could have stayed volcanically active for hundreds of ...

Olympus Mons, Mars' immense shield volcano, towers 21 kilometers above its surface, dwarfing Earth's Mount Everest. Covering an area akin to Italy, its size stems from continuous lava flows over ...

Just before dawn on May 2, a camera 240 million kilometers from Earth caught a moment that seemed almost Earth-like: clouds hugging the flanks of a great mountain, and a summit poking defiantly above ...

An image of Olympus Mons, the tallest volcano not only on Mars but in the entire solar system. New research has revealed water frost for the first time near Mars’s equator.

And in Olympus Mons’ case, the craters on its surface are also only around 200 million years old, which implies this volcano was active surprisingly recently, at least to a limited extent. By studying ...

Orbital view of the Olympus Mons volcano on Mars, the largest known volcano in the solar system. It ...More measures 375 miles across at its base, and the walls of the volcano tower 15 miles above ...

This simulated perspective oblique view shows Olympus Mons, the tallest volcano not only on Mars but in the entire solar system. The volcano measures some 600 km across.

In fact, nothing on Earth can match up to the utter enormity of Olympus Mons: according to the most current mapping data, is a staggering 25 kilometres (16 miles) high.

Olympus Mons lies in the West Hemisphere of the Red planet, in the Tharsis Montes region -- a system of more than 12 volcanoes. All of which, ...

Olympus Mons is the tallest known mountain in the solar system, stretching 16 miles (25km) tall above the Martian surface, and with an enormous base about 374 miles (601km) wide.