system
Given the following post, respond as if you're commenting on Reddit:
human
[Back to the Future] How does Doc Brown account for the Earth's orbit when designing his Time Machine?

According to Wikipedia the Earth travels 67,000 mph through space (I'll just ignore the fact that it's also rotating). It takes only seven minutes for the planet to travel the distance of earths diameter. So if this is not taken into account, when Doc Brown sends Einstein forward in time one minute I would think Einstein would end up either above the surface of the planet or buried deep within it by at least a couple 100 miles when he popped out on the other side of that minute. 

If you were to travel say, 30 years into the past I'm guessing you would end up in deep space nowhere near earth.
gpt
That's what the Flux Capacitor accounts for.  

Think of what the word "flux" means, a state of continuous change.  It's complex math, the orbit of the Earth, its rotation, but still math and therefore calculable.