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The fourth planet · 228 million km from the Sun on average

The surface of Mars

This is Mars as the spacecraft measured it. Every hill and crater comes from about 600 million laser pulses fired at the surface by NASA's Mars Global Surveyor; the colour is from the Viking orbiters. Turn the planet, tap anywhere for its height, then land somewhere.

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Heights are stretched so you can see them: Mars is 6,779 km across and its tallest volcano is about 22 km high, so at true scale the globe would look like a smooth ball.

Places to land

Who has landed

Every spacecraft that has worked on the surface, shown as dots on the globe. Positions are rounded.

LanderCountryLandedWhere

India's Mars Orbiter Mission (Mangalyaan) reached Mars orbit on 24 September 2014 and studied the planet from above until 2022; it did not land, so it is not on this list.

How we know

Heights from laser pulses

MOLA, a laser on Mars Global Surveyor, timed how long each pulse took to bounce back from the ground. From 1999 to 2001 it built a height map of the whole planet accurate to about a metre vertically. That is the globe above.

Close-ups from stereo cameras

For the landing sites, the terrain blends MOLA with stereo images from Europe's Mars Express camera (HRSC), about 200 m per sample. The images on top are from the Viking orbiters (1976–80), or from NASA's Context Camera at about 5 m per pixel where available.

Height above what?

Mars has no sea, so heights are measured from the "areoid": the level where gravity and spin would hold an imaginary ocean. Zero on this page is that level.

Sources

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