AstralisCosmic Atlas
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Two worlds, side by side.

Pick any two objects in the atlas to compare diameters, distances, mass, temperatures and more.

Body A
Earth
planets

Earth

The pale blue dot

The only world known to host life. A thin biosphere of liquid water, plate tectonics, a magnetic field, and a stabilizing Moon make Earth uniquely habitable.

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Body B
Mars
planets

Mars

The rusty red frontier

A cold desert world with the largest volcano and canyon in the solar system. Mars once had rivers and lakes — and may still hold traces of life beneath its surface.

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Stat-by-stat

  • MoonsEarth: 1Mars: 2 (Phobos, Deimos)
  • GravityEarth: 1.0 g (9.81 m/s²)Mars: n/a
  • Day lengthEarth: 23h 56mMars: 24h 37m
  • Year lengthEarth: 365.25 daysMars: 687 Earth days
  • DiameterEarth: 12,742 kmMars: 6,779 km
  • AgeEarth: 4.54 billion yearsMars: n/a
  • Gravity vs EarthEarth: n/aMars: 0.38 g
  • Surface TempEarth: n/aMars: -63 °C avg