Very interesting. This makes me question weather it would be ever practical to travel to another inhabited planet in space if we are already moving so fast per year.
It's relative. If you look at the solar system in isolation, the earth revolves around the sun. If you look at the Universe as a whole, then the movement is different as he describes. I found the twisting of time space interesting though. I've not come across that before.
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Also he drew a tit on the board.