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VISITS TO THE MOON AND PLANETS
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rotation. If she drops her arms (Fig. 53) she will at once spin much quicker.
I must now tell you about a very extraordinary discovery of quite recent times. I don't know whether you noticed that when we made a satellite by spinning the oil,
Fig. 52.Fig. 53.-->
it went sailing round its planet in the same direction as the spin; and this seems natural. We should expect a planet spinning with the arrows (Fig. 54) to have a satellite like A, revolving in the same direction and not like B, revolving in the opposite direction; and yet, to our great surprise, such satellites have been discovered.
