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Compare: Length | Velocity | Mass | Temperature | Light Length | Ratio Lengths, Areas, Volumes

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.

Kilometers:
Miles:

Light-seconds:
Light-minutes:
Light-hours:
Light-days:
Light-years:

Distance Earth-Moon:
Astronomical units:

Round to     decimal places


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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