A unit of distance or length equal to one billion meters, used in astronomy and space science to measure vast distances.
Combines 'giga-' (one billion) with 'meter,' the metric standard unit of length. This term became necessary in astronomy and planetary science to express enormous distances without excessive zeros.
A gigameter is roughly 6.7 times the distance from Earth to the Sun—it's the sweet spot for measuring distances within our solar system without needing trillions of kilometers!
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