If Earth is a car, and we now look out of the rear window, Continue reading “Where Earth is heading From”
Whenever I have to carry a cardboard box, Continue reading “Boxing Day”
Here is a diagram I made for Continue reading “Leonids and the lingering Moon”
My cover picture for Astronomical Calendar 2015
A couple of geometric details about the Queen’s House
Here again is the sky chart
In a room in Pembroke College, Cambridge, hangs a round picture in a square frame.
To return to the subject of how orbits appear when plotted geocentrically (that is, with the Earth stationary).
The red curve is the shortest route between them.
It occurred to me to plot the EDOT in both ways and see how much they differ.
The EDOT is Continue reading “Mars dead ahead”