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Size Comparison: Light Lengths
Comparison of distances in kilometers and miles and units of light, such as light seconds, light years. Light always travels the same distance in a vacuum in a certain amount of time. The corresponding units are used for long distances, i.e. for space. The astronomical unit is the average distance between the Earth and the Sun, about 8 light minutes. For kilometers and miles, you can choose a prefix like trillions for better representation due to the large numbers. Please enter one value to calculate all others.
Example: the closest star to us apart from the Sun, the Alpha Centauri system, is about 4.34 light years away. That's just over 41 trillion kilometers, written out as 41059570251000 km.
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