Hello, Pompous Git
That's not that hard to work out, and not that a revolutionary measure of rotational speed.
Our galaxy does things like this:
Our solar system orbits the center of the Milky Way galaxy. Our sun and solar system move at about 800 thousand kilometers an hour – that’s about 500 thousand miles an hour – in this huge orbit. So in 90 seconds, for example, we all move some 20,000 kilometers – or 12,500 miles – in orbit around the galaxy’s center.
It takes the sun approximately 225-250 million years to complete one journey around the galaxy’s center
And as far as I remember our galaxy moves at 2 million km/h (somewhere).
.
Biting the hand that feeds IT
