How Fast Are You Going When You're Standing Still?

How fast are you going when you're standing still?

To someone standing next to you at the equator, zero latitude, you'd appear stationary. To a Martian hovering over Earth, however, you'd appear to be spinning at 1675 kilometres an hour.From the Sun, it would look like you were riding a terrestrial Tilt-A-Whirl and orbiting the home star at 96560 kilometres an hour.

Reader's Digest
January 2003