Astronomy Almanac >
 Home         
 Images         
 Questions         
 Almanac         
 Our Universe         
   Planets  
   Moons  
   Constellations  
   Stars  
   Messier Objects  
Galaxies  
   Nebulae  
 History         
   Timelines  
   Astronomers  
   Glossary         
Almanac > Planets

Mars

Mars is one of the 8 planets of our solar system. It is the fourth closest planet to the Sun and the second closest planet to Earth.
 

 



Mars

 
 
Fact Sheet

Mass

  6.4185×1024 kg

  107% (Ratio to Earth)

Diameter

  6,794.4 km

  53% (Ratio to Earth)

Average Density

  3,933 kg/m3

  71.30% (Ratio to Earth)

Distance From Sun

  227,940,000 km (Average)

  249,251,000 km (Maximum)

  206,615,600 km (Minimum)

Distance From Earth

  401,355,980 km (Maximum)

  54,510,620 km (Minimum)

Gravity

  3.71 m/s2

Surface Gravity

  37.90% (Ratio to Earth)

Escape Velocity

  5.03 km/s

  45% (Ratio to Earth)

Visual Magnitude

  -1.52 V(1,0)

Orbital Velocity

  24.13 km/s (Average)

  26.50 km/s (Maximum)

  21.97 km/s (Minimum)

Orbit Inclination

  1.850 degrees

Orbit Eccentricity

  0.09

Average Surface Pressure

  6.36 mb at mean radius

Temperature

  -63 degrees Celsius (Average)

  -5 degrees Celsius (Maximum)

  -87 degrees Celsius (Minimum)

Axis Tilt

  25.19 degrees

Aphelion

  249.23×106

Perihelion

  206.62×106

Synodic Period

  779.94 days

 
Description

Size:
The planet Mars is a relatively small planet for our solar system with an average mass of 6.4185×1024 kg and an average diameter of 6,794.4 km. Mars is roughly 53% the size of Earth.

Orbital Characteristics:
The planet Mars obits our Sun at an average speed of 24.13 km/s. At this speed it takes Mars 686.98 Earth days to complete one revolution around the Sun. One day on Mars lasts 24.6597 hours.

Distance from Earth:
This planet is the fourth closest planet to the Sun and the second closest planet Earth.   During its orbit around the sun, its maximum distance from the planet Earth is 401,355,980 km and its minimum distance is 54,510,620 km.

Brightness:
Mars is a relatively bright planet for the solar system with a brightness rating of -1.52 V(1,0) and an irradiance of 589.2 W/m2.

Atmosphere:
Mars has a relatively thick atmosphere with an average density of 3,933 kg/m3 and an average surface pressure of 6.36 mb at mean radius.  The atmosphere is composed of the elements Carbon Dioxide (95.32%), Nitrogen (2.7%), Argon (1.6 %), Oxygen (0.13%), Carbon Monoxide (0.08%), and other trace elements.

The average temperature of the planet Mars is -63 degrees Celsius.

Satellites:
Mars has 2 moons including the following: Deimos, Phobos.