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The gigameter (Gm) is a unit of length in the International System of Units, defined as 109 meters using the SI prefix system.
The following planets list average distances from the Sun in gigameters:
- Mercury: 57.9 Gm
- Venus: 108.2 Gm
- Earth: 149.6 Gm
- Mars: 227.9 Gm
- Jupiter: 778.4 Gm
- Saturn: 1425 Gm
- Uranus: 2867 Gm
- Neptune: 4498 Gm
Other examples of the uses of gigameters:
- Osiris' average distance from the parent star HD 209458 is 6.7 Gm.
- PSR J1719-1438 b's average distance from the pulsar PSR J1719-1438 is 0.666 Gm, which is the smallest orbit of any known exoplanets.
- The mean diameter of the Sun is 1.393 Gm.
- The mean diameter of red supergiant star Betelgeuse is 1,302 Gm.