4th planet from the Sun

Mars

River channels, layered rocks and water-altered minerals record a wetter past.

Diameter
6,779 km
Solar day
24h 39m
Gravity
0.38 × Earth
Global view of Mars

Viking color mosaic · NASA/JPL/USGS

Places on Mars Approximate centres

Perseverance’s Mastcam-Z view of the remnant sedimentary fan in Jezero Crater. NASA/JPL-Caltech/ASU/MSSS ↗

An ancient river delta

Jezero Crater

A river once carried sediment into a lake here. Perseverance reads the layers and rock chemistry to reconstruct those environments, and collects samples that may preserve traces of ancient life.

Articles

Photos & video

7 photographs · 1 video

Clay-rich terrain at Oxia Planum

NASA/JPL-Caltech/University of Arizona ↗

Looking down Mount Sharp

NASA/JPL-Caltech/MSSS ↗

Viking global color views

NASA/JPL/USGS ↗

The delta seen from the ground

NASA/JPL-Caltech/ASU/MSSS ↗

Jezero in a panorama

NASA/JPL-Caltech/ASU/MSSS ↗

Perseverance at Cheyava Falls

NASA/JPL-Caltech/MSSS ↗

The other end of the link

NASA/JPL-Caltech ↗

The last minutes before touchdown

Actual onboard camera views of Perseverance’s descent and touchdown on 18 February 2021. Archival footage; not Rosalind Franklin.

NASA/JPL-Caltech ↗

Missions & milestones

51 launches · 49 linked events

100 matching records

Programs (3)
About these records

Launch outcomes describe the recorded flight. They do not establish whether an old spacecraft is operating today. Events show published targets unless the record confirms an outcome.

Mars & Earth

Earth and Mars are drawn as circles with diameters proportional to their mean diameters, 12,742 and 6,779 kilometres. Mars has 53.2 percent of Earth’s diameter. Approximating both planets as spheres, its surface area is 28.3 percent of Earth’s. The gap between circles does not represent orbital separation.
Solar day
24 h 39 m 35 s · solar day Earth: 24 hours
Year
686.98 Earth days Earth: 365.26
Surface gravity
3.71 m/s² 38% of Earth’s
Mean distance from the Sun
1.52 AU Earth: 1 AU
Surface pressure
0.61 kPa Earth: 101.3 kPa

Mean planetary values. The diagram compares diameters; the gap has no physical scale. Surface pressure varies with altitude and season.

Talking to Mars

A radio command has to cross the space between the planets. Choose an illustrative separation.

One way12.51 min
There and back25.02 min

Choose an illustrative separation. These are calculations, not the planets’ current positions; scheduling and execution add time.

Communicating with a rover

4 min read