> will vary wildly Neptune is about 30AU from the Sun. The Earth's distance from Neptune will presumably vary somewhere between 28AU and 32AU. Light travels 1A

> will vary wildly Neptune is about 30AU from the Sun. The Earth's distance from Neptune will presumably vary somewhere between 28AU and 32AU. Light travels 1AU in about 8 minutes, 28AU in about 224 minutes, 30AU in about 240 minutes, and 32AU in about 256 minutes. Depending on your use-case, that's not a particularly wild variation.