# Light hour

Main Article
Discussion
Related Articles  [?]
Bibliography  [?]
Citable Version  [?]

This editable, developed Main Article is subject to a disclaimer.

The light hour is the distance that the light travels in vacuum in one hour and so is a unit of distance.

Similar units are the light second, light minute, light day, light week, light month, light year.

### Numerical value

As opposed to the light year, whose value more or less depends on the definition of year, the value of the light hour is defined exactly.

### Comparison to other Units

• 1 AU = 0.14 light hours
• 1 light hour = 1,079,252,848.800 km
• 1 light hour = 638,481,190.100 mi[2]
• 1 light hour = 3,540,855,803,149.606 ft[3] = 3.5408558 * 10<sump>12 ft
• 1 light hour = 1,180,285,267,716.535 yd [4] = 1.1802853 * 1012 yd

### Distances in Light hours[5]

• the maximum distance between sun and Mercury is about 57.9 Mio km or 0.05 light hours
• the maximum distance between sun and Venus is about 108.2 Mio km or 0.10 light hours
• the maximum distance between sun and Earth is about 149.6 Mio km or 0.14 light hours
• the maximum distance between sun and Mars is about 227.9 Mio km or 0.21 light hours
• the maximum distance between sun and Jupiter is about 778 Mio km or 0.72 light hours
• the maximum distance between sun and Saturn is about 1427 Mio km or 1.32 light hours
• the maximum distance between sun and Uranus is about 2870 Mio km or 2.66 light hours
• the maximum distance between sun and Neptune is about 4496 Mio km or 4.17 light hours
• the maximum distance between sun and Pluto is about 5946 Mio km or 5.51 light hours
• the maximum distance between sun and Sedna[6] is about 133,593 Mio km or 123.5 light hours

### Notes

1. Review of Particle Physics Particle Data Group: W.-M. Yao et al., J. Phys. G 33, 1 (2006).
2. 1 mi = 1609.344 m
3. 1 ft = 0.3048 m
4. 1 yd = 0.9144 m
5. Joachim Hermann, Großes Lexikon der Astronomie, Bertelsmann Club GmbH, 00541 3
6. 2003 VB12, 90377