This wouldn\'t work. Let\'s see why: Let\'s say a fast ship moves at 10 AU / hr. We go top speed for 1 second. Using your AU/hr, you are already many kilometers away. You can\'t manuver anymore when you go that fast. You would be going so fast, collision detection could not work.
So I know what you are thinking. \"But just call it AU/hr, let us still move the same speed\"
No. Let\'s say we can go 60 AU/hr, or 1 AU per minute. Let\'s go at full speed for 1 second. 1/60 AU away now. The sun is 93,000,000 miles away. Let\'s just say it\'s some number of 100,000,000 km away, or 100,000,000,000 m (100 billion m). Now, no matter how slow AU you are going, it\'s going to be several billion m away in one second. But, really, we barely moved. Maybe one rung of the shop, if we were near that in game. So, we need to conclude that one block is actually about a million kilometers. The exact math may be wrong, I\'m tired. But the point is the same.