Can the reverse be true too? i.e. if you are on the moon and can see what happens 1000km away, before someone else on earth 2000km away from that event, is that the future? Is that possible?
Can that then be extended to 27 lightyears into the future too?
To understand why picture the triangle between the start point (A), end point (B) and the moon (M). The distance AMB is larger than AB.
Google or Wikipedia 'light cone', pretty interesting stuff.
If it wasn't light that was being transmitted the man on the moon could warn the man on earth about what's happening before it's reaching him in the same way that people near the epicentre of an earthquake can use twitter to warn people further away before it hits: http://recovery.doi.gov/press/us-geological-survey-twitter-e...
Disclaimer: This is deduced logic and not scientific information.
Now, after reading a comment elsewhere in this thread, which talks about how a cpu can execute six instructions in the time it takes the light from my monitor to reach my eyes, the data center thing seems a lot more reasonable.