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Mars

Connor Calvert

@connor

Information on the astronomical development, evolution and properties of Mars, the fourth planet from the sun in the Milky Way.

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Hearts

Comments

Connor Calvert

@connor

Information on the astronomical development, evolution and properties of Mars, the fourth planet from the sun in the Milky Way.

Live Science - Mars

Find out everything there is to know about Mars and stay updated on the latest Mars news with the comprehensive articles, interactive features and Mars pictures at LiveScience.com.
http://www.livescience.com/topics/mars
Universe Today - Mars

Mars, otherwise known as the âRed Planetâ, is the fourth planet of our Solar System and the second smallest (after Mercury). Named after the Roman God of war, its nickname comes from its reddish appearance, which has to do with the amount of iron oxide prevalent on its surface.
http://www.universetoday.com/14701/mars/
Solar Views - Mars

Mars is the fourth planet from the Sun and is commonly referred to as the Red Planet. The rocks, soil and sky have a red or pink hue. The distinct red color was observed by stargazers throughout history.
http://solarviews.com/eng/mars.htm
Mars Facts For Kids - Science Kids

Mars, or the 'Red Planet' as it is sometimes known, has a dusty, rocky surface and a thin atmosphere. Its relatively calm conditions and close proximity to earth make it the most likely destination for future planet exploration by humans.
http://www.sciencekids.co.nz/sciencefacts/planets/mars.html
Mars - Planets For Kids

It is easy to forget that Earth is not the only planet in the solar system. Seven (or eight if you include Pluto) other planets whiz around the sun just like ours. Of those planets, none of them are closer or more engaging to the imagination than Mars.
http://www.planetsforkids.org/planet-mars.html
Mars Facts, Information, Pictures - Encyclopedia

Get information, facts, and pictures about Mars at Encyclopedia. Make research projects and school reports about Mars easy with credible articles from our free, online encyclopedia and dictionary.
http://www.encyclopedia.com/topic/Mars.aspx
Mars Facts: Life, Water and Robots on the Red Planet

Learn about planet Mars' atmosphere, water supply and the possibility to support life, plus, findings from the Mars exploration rover mission.
http://www.space.com/47-mars-the-red-planet-fourth-planet-from-the-sun.html
50 Interesting Facts about Mars - Random Facts

Mars facts, from ancient myth and science to modern debates about life on the Red Planet.
http://facts.randomhistory.com/2008/12/22_mars.html
Mars - Wikipedia

Mars is the fourth planet from the Sun and the second smallest planet in the Solar System, after Mercury.
https://en.wikipedia.org/wiki/Mars
Mars Information, Red Planet Facts, News, Photos - National Geographic

Get information, facts, photos, news, videos, and more about planet Mars from National Geographic.
http://science.nationalgeographic.com/science/space/solar-system/mars-article
Mars: Educational facts and history of the planet Mars - Nine Planets

Mars is the fourth planet from the Sun and the seventh largest.Mars (Greek: Ares) is the god of War. The planet probably got this name due to its red color; Mars is sometimes referred to as the Red Planet. (An interesting side note: the Roman god Mars was a god of agriculture before becoming associated with the Greek Ares; those in favor of colonizing and terraforming Mars may prefer this symbolism.) The name of the month March derives from Mars.
http://nineplanets.org/mars.html
Interesting Facts About Planet Mars

Mars is a constant point of discussion for space explorers around the world. We've sent dozens of spacecraft there to study it.
http://www.universetoday.com/14853/interesting-facts-about-planet-mars/
Mars Facts - NASA

Mars planet facts and information. Compare Earth & Mars. Fun science images for kids, school, family and space fans. Mars in space, night sky and history.
http://mars.nasa.gov/allaboutmars/facts/
Mars Facts: Interesting Facts about Planet Mars - The Planets

Mars is the fourth planet from the Sun and last of the terrestrial planets. Like the rest of the planets in the solar system (except Earth), Mars is named after a mythological figure - the Roman god of war. In addition to its official name, Mars is sometimes called the Red Planet because of the brownish-red color of its surface.
http://theplanets.org/mars/
Mars Facts: Interesting Facts about the Planet Mars - Space Facts

Scientific, historic and cultural facts about Mars, the "Red Planet". Learn about Mars' features, characteristics and missions!
http://space-facts.com/mars

Comments

Mars

Mars in true color, ^[a] as captured by the Hope orbiter. The Tharsis Montes can be seen at the center, with Olympus Mons just to the left and Valles Marineris at the right

Designations

Adjectives

Martian

Symbol

Orbital characteristics^[1]

Epoch J2000

Aphelion

249261000 km
(1.66621 AU)^[2]

Perihelion

206650000 km
(1.3814 AU)^[2]

Semi-major axis

227939366 km
(1.52368055 AU)^[3]

Eccentricity

0.0934^[2]

Orbital period (sidereal)

686.980 d
(1.88085 yr; 668.5991 sols)^[2]

Orbital period (synodic)

779.94 d
(2.1354 yr)^[3]

Average orbital speed

24.07 km/s^[2]

Mean anomaly

19.412°^[2]

Inclination

1.850° to ecliptic
5.65° to Sun's equator
1.63° to invariable plane^[4]

Longitude of ascending node

49.57854°^[2]

Time of perihelion

2022-Jun-21^[5]

Argument of perihelion

286.5°^[3]

Satellites

2 (Phobos and Deimos)

Physical characteristics

Mean radius

3389.5 ± 0.2 km^[b] ^[6]
(2106.1 ± 0.1 mi)

Equatorial radius

3396.2 ± 0.1 km^[b] ^[6]
(2110.3 ± 0.1 mi; 0.533 Earths)

Polar radius

3376.2 ± 0.1 km^[b] ^[6]
(2097.9 ± 0.1 mi; 0.531 Earths)

Flattening

0.00589±0.00015^[5]^[6]

Surface area

1.4437×10⁸ km²^[7]
(0.284 Earths)

Volume

1.63118×10¹¹ km³^[8]
(0.151 Earths)

Mass

6.4171×10²³ kg^[9]
(0.107 Earths)

Mean density

3.9335 g/cm³^[8]

Surface gravity

3.72076 m/s² (0.3794 g₀)^[10]

Moment of inertia factor

0.3644±0.0005^[9]

Escape velocity

5.027 km/s
(18100 km/h)^[11]

Synodic rotation period

1.02749125 d^[12]
24^h 39^m 36^s

Sidereal rotation period

1.025957 d
24^h 37^m 22.7^s^[8]

Equatorial rotation velocity

241 m/s
(870 km/h)^[2]

Axial tilt

25.19° to its orbital plane^[2]

North pole right ascension

317.68143°^[6]
21^h 10^m 44^s

North pole declination

52.88650°^[6]

Albedo

0.170 geometric^[13]
0.25 Bond^[2]

Temperature

209 K (−64 °C) (blackbody temperature)^[14]

Surface temp.	min	mean	max
Celsius	−110 °C^[15]	−60 °C^[16]	35 °C^[15]
Fahrenheit	−166 °F^[15]	−80 °F^[16]	95 °F^[15]

Surface absorbed dose rate

8.8 μGy/h^[17]

Surface equivalent dose rate

27 μSv/h^[17]

Apparent magnitude

−2.94 to +1.86^[18]

Absolute magnitude (H)

−1.5^[19]

Angular diameter

3.5–25.1″^[2]

Atmosphere^[2]^[20]

Surface pressure

0.636 (0.4–0.87) kPa
0.00628 atm

Composition by volume

95.97% carbon dioxide
1.93% argon
1.89% nitrogen
0.146% oxygen
0.0557% carbon monoxide
0.0210% water vapor

Source : Wikipedia under CC-BY-SA license

Links
Media

Live Science - Mars

Find out everything there is to know about Mars and stay updated on the latest Mars news with the comprehensive articles, interactive features and Mars pictures at LiveScience.com.
http://www.livescience.com/topics/mars
Universe Today - Mars

Mars, otherwise known as the âRed Planetâ, is the fourth planet of our Solar System and the second smallest (after Mercury). Named after the Roman God of war, its nickname comes from its reddish appearance, which has to do with the amount of iron oxide prevalent on its surface.
http://www.universetoday.com/14701/mars/
Solar Views - Mars

Mars is the fourth planet from the Sun and is commonly referred to as the Red Planet. The rocks, soil and sky have a red or pink hue. The distinct red color was observed by stargazers throughout history.
http://solarviews.com/eng/mars.htm
Mars Facts For Kids - Science Kids

Mars, or the 'Red Planet' as it is sometimes known, has a dusty, rocky surface and a thin atmosphere. Its relatively calm conditions and close proximity to earth make it the most likely destination for future planet exploration by humans.
http://www.sciencekids.co.nz/sciencefacts/planets/mars.html
Mars - Planets For Kids

It is easy to forget that Earth is not the only planet in the solar system. Seven (or eight if you include Pluto) other planets whiz around the sun just like ours. Of those planets, none of them are closer or more engaging to the imagination than Mars.
http://www.planetsforkids.org/planet-mars.html
Mars Facts, Information, Pictures - Encyclopedia

Get information, facts, and pictures about Mars at Encyclopedia. Make research projects and school reports about Mars easy with credible articles from our free, online encyclopedia and dictionary.
http://www.encyclopedia.com/topic/Mars.aspx
Mars Facts: Life, Water and Robots on the Red Planet

Learn about planet Mars' atmosphere, water supply and the possibility to support life, plus, findings from the Mars exploration rover mission.
http://www.space.com/47-mars-the-red-planet-fourth-planet-from-the-sun.html
50 Interesting Facts about Mars - Random Facts

Mars facts, from ancient myth and science to modern debates about life on the Red Planet.
http://facts.randomhistory.com/2008/12/22_mars.html
Mars - Wikipedia

Mars is the fourth planet from the Sun and the second smallest planet in the Solar System, after Mercury.
https://en.wikipedia.org/wiki/Mars
Mars Information, Red Planet Facts, News, Photos - National Geographic

Get information, facts, photos, news, videos, and more about planet Mars from National Geographic.
http://science.nationalgeographic.com/science/space/solar-system/mars-article
Mars: Educational facts and history of the planet Mars - Nine Planets

Mars is the fourth planet from the Sun and the seventh largest.Mars (Greek: Ares) is the god of War. The planet probably got this name due to its red color; Mars is sometimes referred to as the Red Planet. (An interesting side note: the Roman god Mars was a god of agriculture before becoming associated with the Greek Ares; those in favor of colonizing and terraforming Mars may prefer this symbolism.) The name of the month March derives from Mars.
http://nineplanets.org/mars.html
Interesting Facts About Planet Mars

Mars is a constant point of discussion for space explorers around the world. We've sent dozens of spacecraft there to study it.
http://www.universetoday.com/14853/interesting-facts-about-planet-mars/
Mars Facts - NASA

Mars planet facts and information. Compare Earth & Mars. Fun science images for kids, school, family and space fans. Mars in space, night sky and history.
http://mars.nasa.gov/allaboutmars/facts/
Mars Facts: Interesting Facts about Planet Mars - The Planets

Mars is the fourth planet from the Sun and last of the terrestrial planets. Like the rest of the planets in the solar system (except Earth), Mars is named after a mythological figure - the Roman god of war. In addition to its official name, Mars is sometimes called the Red Planet because of the brownish-red color of its surface.
http://theplanets.org/mars/
Mars Facts: Interesting Facts about the Planet Mars - Space Facts

Scientific, historic and cultural facts about Mars, the "Red Planet". Learn about Mars' features, characteristics and missions!
http://space-facts.com/mars

Mars

Mars in true color, ^[a] as captured by the Hope orbiter. The Tharsis Montes can be seen at the center, with Olympus Mons just to the left and Valles Marineris at the right

Designations

Adjectives

Martian

Symbol

Orbital characteristics^[1]

Epoch J2000

Aphelion

249261000 km
(1.66621 AU)^[2]

Perihelion

206650000 km
(1.3814 AU)^[2]

Semi-major axis

227939366 km
(1.52368055 AU)^[3]