© Reuters

Mount Sharp, 2012 -

This picture displays the bottom of Mount Sharp, also known as Aeolis Mons, on Mars. The mountain stands at a height of 5.5 km (3.4 miles) above the surrounding valley.

© Reuters

Ophir Chasma, 2015 -

This image captures a canyon on Mars, specifically in the northern part of the planet's extensive canyon system.

© Reuters

Nili Patera, 2014 -

Nili Patera, situated atop a lava bed on the grounds of an ancient volcano, stands as one of Mars' most active dune fields.

© Reuters

Gullies, 2017 -

These flow features, resembling moraines on Earth, are located in the mid-latitudes of Mars. This indicates that the deposits may contain ice or have had ice in the past.

© Reuters

Yellowknife Bay, 2013 -

These spherical shapes in Yellowknife Bay are believed to be concretions, suggesting that water seeped through sediment pores to create them.

© Reuters

Crater, 2014 -

An orbiter captured this image of an impact crater on Mars.

© Reuters

Link, 2012 -

This rock outcrop, known as Link, displays rounded gravel fragments, or clasts, ranging in size up to a few centimeters.

© Reuters

Sandy hill, 2014 -

These are the sand dunes of Mars' northernmost region, visible as they appear after being covered by seasonal carbon dioxide (dry) ice during winter.

© Reuters

Acidalia Plain, 2015 -

This plain is depicted as the fictional touchdown location for a crewed mission called Ares 3 in the popular novel and film 'The Martian.'

© Reuters

Hellas Planitia, 2011 -

The width of the channels in the Hellas Planitia basin varies from 1 to 10 meters (3.3 feet to 33 feet). 

© Reuters

Noctis Labyrinthus , 2013 -

Located on the Tharsis rise in the upper part of Valles Marineris, this area is recognized for its intricate network of deep valleys with steep walls.

© Reuters

Gale crater, 2013 -

This crater, thought to be around 3.5 to 3.8 billion years old, is likely a dry lake located near the northwestern region of the Aeolis quadrangle.

© Reuters

Gale crater, 2013 -

The rover designed to explore Gale crater, which is about the size of a car, can be seen as a blue dot in the lower right corner of the image.

© Reuters

Gale crater, 2012 -

This photo shows a section of the wall of Gale crater, where a system of valleys, thought to be created by water, enters the crater from the surrounding area.

© Reuters

Shaler, 2013 -

This rock formation's name is Shaler.

© Reuters

Trenches, 2008 -

The Robotic Arm of the Phoenix lander dug these two trenches.

© Reuters

Victoria Crater, 2006 -

This impact crater found in the Meridiani Planum plain has a width of approximately 730 meters (2,395 feet)and is named after a ship from Ferdinand Magellan's fleet, the first to sail around the world.

© Reuters

Meteorite, 2005 -

NASA's Mars Exploration Rover Opportunity took this photo of an iron meteorite on Mars.

© Reuters

Columbia Hills, 2004 -

This photograph shows the Columbia Hills, a collection of small hills situated in Gusev crater.

© Reuters

Water, 2015 -

This picture displays narrow streaks approximately 100 meters (328 feet) long that are believed to be created by flowing water.

© Reuters

Garni crater, 2015 -

These dark, narrow streaks emerging out of the walls of Garni crater are called recurring slope lineae.

© Reuters

Round depression, 2015 -

NASA's Mars Reconnaissance Orbiter captured this circular depression on the surface of Mars in February 2015.

© Reuters

Color Photos, 2008 -

This is one of the initial color photographs of the surface of Mars captured after the Phoenix Mars lander spacecraft safely touched down on May 25, 2008. It marked the historic first landing near Mars's northern pole.

© Reuters

Mars -

This is the percussion drill located at the tip of the Curiosity Robotic Arm, as it contacts the rock surface on January 27, 2013.

© Reuters

Hellas Planitia, 2008 -

This image displays a view from a different angle of a mountain located in eastern Hellas Planitia. The mountain harbors sizable glaciers beneath rocks.

© Reuters

Hellas Planitia, 2008 -

This is an alternative view of the mountain in the eastern Hellas Planitia, which revealed the presence of sizable glaciers concealed beneath fragmented rocks.

© Reuters

Mound, 2017 -

This mound appears to have blocked the path of dunes as they move south (to the right of this image).

© Reuters

Cliff, 2017 -

NASA's Mars Reconnaissance Orbiter has captured an intriguing rugged cliff edge in this image.

© Reuters

Southern hemisphere, 2017 -

Small pits are visible in the bright residual layer of carbon dioxide ice near a larger, circular feature that extends through the ice and dust. This may be an impact crater or a pit created by collapse.

© Reuters

Mars, 2016 -

The NASA Hubble Space Telescope captured this remarkable image of the Red Planet.

© Reuters

Nili Fossae, 2016 -

Nili Fossae, situated on the northwest edge of Isidis Planitia crater, is a vibrant area on Mars.

© Reuters

Impressive view, 2015 -

A plane is visible flying by, while the crescent moon and planets Venus and Mars can be seen close by.

© Reuters

Outcrop, 2004 -

The Opportunity rover captured an intriguing rock formation in this photograph.

© Reuters

Frost, 2015 -

This photo taken by NASA's Mars Reconnaissance Orbiter displays frost covering Mars's surface.

© Reuters

Rock geology, 2014 -

This evenly-layered rock formation displays a pattern typical of a lake-floor sedimentary deposit, suggesting a lake once filled this crater.

© Reuters

Cumberland, 2014 -

The Curiosity rover bored into a rock nicknamed Cumberland.

© Reuters

Mast Camera, 2012 -

The Martian landscape serves as the backdrop for the Alpha Particle X-Ray Spectrometer in this image.

© Reuters

Cape Verde, 2006 -

Cape Verde, a landscape with rocky cliffs, stands on the edge of Victoria crater. These cliffs were named after the country, as a tribute to Ferdinand Magellan who had explored Cape Verde during his round-the-world journey.

© Reuters

Bathurst Inlet, 2012 -

This marks the highest point of Bathurst Inlet, a rock situated on the surface of Aeolis Palus within the Gale crater.

© Reuters

Newton crater, 2011 -

These water flows are observed during the spring and summer on a slope within the Newton crater.

© Reuters

Sheepbed, 2013 -

This is a rock formation found at the Sheepbed, a deposit of mudstone located in the Yellowknife Bay region within Gale crater.

© Reuters

Marquette Island, 2010 -

Marquette Island is a rock about the size of a basketball whose texture and composition suggest it came from deep inside the Martian crust.

© Reuters

Becquerel crater, 2008 -

The pattern in this sedimentary bedrock within Becquerel crater suggests rhythmic bedding.

© Reuters

Phoenix, 2008 -

The descent of NASA's Phoenix lander to the Martian surface with the attached parachute is visible.

© Reuters

Valles Marineris, 2006 -

Valles Marineris serves as Mars's counterpart to the Grand Canyon.

© Getty Images

Reull Vallis, 2004 -

The Reull Vallis was likely formed by water. The valley got its name from the Gaelic word for planet.

© Getty Images

Echus Chasma, 2008 -

This aerial photograph displays the Echus Chasma, which is among the largest water source regions on Mars.

© Getty Images

Sleepy Hollow, 2004 -

This circular topographic view, known as Sleepy Hollow, was discovered in the Gusev Crater on Mars.

© Getty Images

Mars Pathfinder, 1997 -

This photo depicts NASA's Mars Pathfinder probe surveying the planet's landscape in 1997.

© Getty Images

Echus Chasma, 2008 -

Waterfalls may have cascaded down these towering cliffs in the past, which stand at a staggering 4,000 meters (13,123 feet). The remarkably even valley floor indicates that it was subsequently submerged by basaltic lava.

© Getty Images

Phoenix, 2008 -

This image depicts the Phoenix lander arriving on the Red Planet, as envisioned by an artist.

© Getty Images

Mars, 1997 -

This high-definition image captures the detailed features of Mars, while it was positioned approximately 100 million km (60 million miles) away from Earth.

See also: Mission to Mars: every successful landing on the red planet

© Getty Images