Standing on a spinning rock

December 27, 2012

Another sixties icon passes beyond the veil : Gerry Anderson has gone to join Joe 90 and Torchy the Battery Boy in the sky. Guardian obituary here. First ever episode of Supercar here, and if you want to check out the purple page-boy haircuts and metallic mini-skirts, try Episode 1 of UFO here.

Meanwhile, an update on my Patrick Moore nostalgia post. The mysterious “Gareth” turned out to be my own nineteen year old son, who for Christmas bought me that a 1964 edition of The Observers Book of Astronomy, just as I remembered it!! What a nice boy. His sister bought me a very steam-punk sextant so it was a rather nice antique astronomical christmas.

Concrete experience is very important in science. (Bear with me, there shall be A Link). Theory has to be constantly checked and re-rooted in observed fact. But the concrete is also important at a simple human level. Its good to be reminded we are doing something real; science is not an abstract game. Its wonderful when you show people Saturn through a small telescope. Suddenly its really there – its not on TV, you can see it with your own eyes. Its right there, in that direction.

The Observers Book has a chapter about equipment, and stresses the importance of a good mounting, and preferably some kind of manual or clockwork drive. As Patrick says, when people first look through a reasonably high powered telescope, they never fail to be struck by how fast the stars are moving. Indeed. Then suddenly you realise – you actually physically feel – that you are standing on a huge rock which is spinning in space.

Count one, two. That spot you occupied one second ago – its now three hundred metres over there.

Well…. maybe now we need to think about the Earth’s orbit; the local solar motion; the orbit of the Local Standard of Rest around the Galactic Centre; the motion of the Galaxy with respect to the CMB; Mach’s Principle maybe … or maybe not. That will do. We stand on a spinning rock. And you can see it with your own eyes.