Featured Article: This Article Is Recommended For New Users. Edit

Mars spacepedia
Number of Sattelites 2/1 Will İn 400.000/400 Thousand Years Later
Discovered by Aleksandar Cakic
Date of Discovery 11 March 2030
Distance from Sun 142.5 million miles
Diameter 4246 miles
6800 kilometers
Axial tilt 25.2 degrees
Orbit 687 Earth days
Position in Solar System Fourth planet from Sun
Surface Features Mountainous plain while several craters and valleys
Albedo (geometric) 0.17
(bond) 0.25
Aphelion 155.76 million miles
Perihelion 129.17 million miles
Mass of Planet 1.32 x 10^23 kg
Escape Velocity 5.03 kilometers/second

Mars is the fourth planet from the Sun. Mars has been known and observed since ancient times, and is known as "The Red Planet", due to of its iron rust that causes its reddish hue. Mars has two known moons, named Phobos and Deimos.


Mars' atmosphere mostly consists of carbon dioxide. In fact, it makes up 95% of the atmosphere. The rest is made up of 3% nitrogren, about two percent argon, and the rest are trace gases such as water and oxygen. The atmosphere of Mars is much less dense than that of Earth's. The atmospheric pressure of Earth's atmosphere at about fourty kilometers in altitude would equal that of the atmospheric pressure of Mars at surface level.

Landing Edit

User:Sasa1979 (Aleksandar Cakic) wanted to land on Mars in 2030 when he was 18 years old.

Geographical FeaturesEdit

Mars Cut
Proteus spacepedia

Mars is home to the highest mountain the Solar System named Olympus Mons, which means "Mount Olympus". It is more than three times the height of Mount Everest, reaching 27 km in height. Olympus Mons is actually an extinct volcano called a dormant volcano. It does not erupt anymore because the vent of the volcano is shut, as seen in the picture.

Another geographical feature is the Valles Marineris, which means "Mariner Valleys". It is 700 km in width, leaving the Grand Canyon in the dust only reaching 20 km in width. It is believed this valley was flooded with water in the past.


Mars makes one orbit around the Sun in approximately two Earthen years. Mars' aphelion is around one hundred forty one million, five hundred thousand miles, or 1.2 AU from the Sun. The perihelion is around one hundred forty five million miles, or about 1.5 AU. Although, this orbit period can be perturbed by neighboring objects in the nearby Asteroid belt, and even the Earth.


643px-Olympus Mons alt

The volcanic activity, more referred to as volcanism, has caused lava flows over the few millions of years, leaving behind trenches on the surface that can be viewed through even amateur telescopes on Earth. Examples of volcanism can be traced by to Olympus Mons, which is a possibly dormant shield volcano on the surface of Mars. It has not erupted in thousands of years, yet its last eruption shot a replete of debris into the atmosphere, causing a blackout for weeks. The lava is actually black.


Main Articles: Phobos and Deimos Mars harbors two moons in its gravitational pull, named Phobos and Deimos. Phobos, the larger and denser of the two, is home to the Stickney crater, a crater that is easily spotted to the right of the moon. Phobos was discovered by Asaph Hall in 1877. The next moon, Deimos, is the smaller and more irregular-shaped moon, which stands to reason that it was an inhabitant of the Asteroid belt. It was too discovered by Asaph Hall in the same year.


Mars Cut


Puck spacepedia
Proteus spacepedia


Dwarf Planets

613px-Phobos colour 2008

Community content is available under CC-BY-SA unless otherwise noted.