"Pluto & Charon" e-book available for free - but only for two days!

This is a simulation of what Clyde Tombaugh would have seen on 23 January 1930 if he had a better telescope - say, like the Hubble. ;-) Note that he was looking at the south pole, the part not cartographed by New Horizons, hence, no better resolution is available.

And these are the positions of Pluto and its five moons on the day Tombaugh first looked at them.

The images were created with the assistance of Celestia 1.6.1 to accompany our "Pluto & Charon" pictorial volume whose e-book edition - but only the English one! - will be available for free next Saturday and Sunday, 22 and 23 July, from kdp and/or Amazon.

There is no change to the full-colour print edition (don't blame me for the seemingly forbidding price in Dollars, compared to those in Pounds and Euros - the computation was Amazon's, not mine!)