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I was thinking the only error should be from Earth's orbital velocity. Avg. appears to be 30 km/s, which the light would inherit, throwing it off by ~14,400 km by the time it gets to the Sun (only 1% of its diameter).
Thanks! This is something I’ve always wondered about, and am still confused by. Can you explain with a few more words?
I'll take a shot at this. Whenever you trigger the laser, it's velocity can be decomposed into a vector of [very nearly c towards the sun, ~14km/s (sic) perpendicular to that]. The magnitude of that vector will be a speed of c, by relativity.
30km/s*. And that's perpendicular to your aim because the Earth's velocity is tangential to the orbit, therefore perpendicular to the orbit's radius (your aim). Within the error factor of Earth orbit's ovalness.
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