My cover picture for Astronomical Calendar 2015
Category: geometry
Stairs in Greenwich Lead to Molecules in Space
A couple of geometric details about the Queen’s House
Continue reading “Stairs in Greenwich Lead to Molecules in Space”
Azequid, and other projections
Fisheye pictures
In a room in Pembroke College, Cambridge, hangs a round picture in a square frame.
Five petals of Venus
To return to the subject of how orbits appear when plotted geocentrically (that is, with the Earth stationary).
We’re at Guantánamo, Which Way to Mecca?
The red curve is the shortest route between them.
Mars dead ahead
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”
Wild Carrot Galaxies
White spirals: that was the cover-painting theme for my Astronomical Calendar one year (1994). On the front was a hurricane called Hyacinth, its violent spiral spanning several hundred miles; inside was the Whirlpool Galaxy, otherwise known as Messier 51, forty thousand light-years wide; and on the back was the plant called Queen Anne’s Lace, painted at true scale, I think, its flowering head six inches wide.
I remembered about this because I’ve found five other drawings I must have made of that plant in South Carolina.
Quadrantids and Edot revisited
This is another confession. Continue reading “Quadrantids and Edot revisited”
The Quadrantids and the Edot
The Quadrantid meteor stream hits us in the night of Jan. 3/4. Here is the picture from Astronomical Calendar 2016 page 6, but more expansively and with an addition.
