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Mars

Mars is the first planet outside the Earth's orbit, with a year 1.88 Earth years long. It has a very thin carbon dioxide atmosphere, and a mean surface temperature of a chilly -63°C.

Mars
    Vital statistics:
  • Mass: 6.4 x 1023 kg = 0.107 Earths/8.8 Moons
  • Diameter: 6779 km = 0.53 Earth's
  • Density: 3.93 tonnes/m3 = 0.713 Earth's density
  • Surface gravity: 3.7 m/s2 = 0.38g
  • Distance from Sun: 207 - 249 million km (227.9 Mkm semi-major axis) = 1.38 - 1.67 AU (Earth-Sun distances)
  • Period of orbit: 687.0 Earth days / 1.88 Julian years
  • Period of rotation: 1.03 Earth days (24.62 h)
  • No. of moons: 2
  • Atmosphere: 0.64 kPa (0.63% Earth's atmosphere), 96.0% CO2, 1.9% argon, 1.9% nitrogen, 0.15% O2, and trace gases, including 210 ppm (parts per million) water vapour.

Moons

Mars has two natural satellites, the small moons Phobos and Deimos.

Phobos, moon of Mars
Phobos, moon of Mars

Content © Renewable.Media. All rights reserved. Created : October 25, 2015 Last updated :December 27, 2015

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Mathematics

Mathematics is the most important tool of science. The quest to understand the world and the universe using mathematics is as old as civilisation, and has led to the science and technology of today. Learn about the techniques and history of mathematics on ScienceLibrary.info.

Mathematics

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Bernhard Riemann

1826 - 1866

Bernhard Riemann was a German mathematician whose revolutionary ideas of multi-dimensional space challenged Euclidean geometry perspectives, and ultimately led mathematics to radically new approaches, and found applications in many fields, such as General Relativity.

Bernhard Riemann, 1826 - 1866, German mathematician
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