...
Now lets make this clock run at half speed - 24 hours for a revolution of the hour hand. Make that hour hand as long as the radius of the Earth and the tip will be moving a THOUSAND MILES PER HOUR.
.....
No offense meant, but that was a rather complicated way to say that a point on the equator moves at ~1000 miles/hour. Equator is ~40000km around, => 40000km/24h => ~1666km/h, or ~1000 miles/hour.
Now make that same calculation with the earth orbiting the sun, and you will get to ~67000 miles/hour or >100000km/h - wooooosh
It was a way of "putting it into scale".
Imagine the hour hand of your watch, or clock, at HALF speed, with the tip moving 1000mph.
That's the size of the Earth...
I confess I did kind of present it almost like how I would to kids...
