fredsherbet: At the BVE exhibition – 360 view: http://occip.it/pt405cf4 http://twitpic.com/405cf4

Terminology
Events – These are appointments, meetings, and Calendar items.
Task – These are the task or “to do” items.
Calendar Item – This refers to something that is either an Event or a Task

Do you need a frame of reference against which to measure rotational velocity?

Or, is there such a thing as 'not spinning'? (What I mean is, you might say there is no such thing as 'not moving' (referring to linear velocity) since you need to provide a frame of reference to say what it isn't moving relative to.)

Finally, is it a valid question to ask 'how fast is the Sun rotating?' without providing (or implying) a frame of reference?

Useful for any railcard holder (like 16-25 young persons railcard). You can get it linked to you oyster for lower daily caps. But you have to have some difficult conversations with ticket office workers. Instructions here for the ticket office man http://www.oyster-rail.org.uk/railcard-discounts/

"Fancy cheaper tube fares? They're yours if you have a Gold Card. That's the special bonus bit of cardboard given to everyone in London and the southeast who buys an annual travelcard for their train journeys. A Gold Card saves one-third off all off-peak fares on National Rail (mine saves me a packet every time I head out of town to the seaside or somewhere). And now, as of this month, it saves one-third off all off-peak fares on London Underground too. Who knew?"