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Light travels at a speed of 299,792 kilometers per second; 186,287 miles per second. It takes 499.0 seconds for light to travel from the Sun to the Earth , a distance called 1 Astronomical Unit . below I list the light travel times from the Sun to each planet:

Planet           Distance in AU            Travel time
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Mercury               0.387        193.0 seconds   or    3.2 minutes
Venus                 0.723        360.0 seconds   or    6.0 minutes
Earth                 1.000        499.0 seconds   or    8.3 minutes
Mars                  1.523        759.9 seconds   or   12.6 minutes
Jupiter               5.203       2595.0 seconds   or   43.2 minutes
Saturn                9.538       4759.0 seconds   or   79.3 minutes
Uranus               19.819       9575.0 seconds   or  159.6 minutes
Neptune              30.058      14998.0 seconds   or    4.1 hours
Pluto                39.44       19680.0 seconds   or    5.5 hours
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