The evening sky is still almost uninhabited by planets.
Guy’s Blog
The rescue boats of Dunkirk
I came upon this spectacle by sheer luck, though it’s only five hundred yards from my door.
Yet again the need for Approval Voting
I’ve received my postal ballot, in advance of the June 8 British election. As with so many elections, it demonstrates, glaringly, Continue reading “Yet again the need for Approval Voting”
Lost comments
Some comments that readers made a while ago have become “unapproved,” Continue reading “Lost comments”
More devices: the Star Bottle and others
Device One was the portable flexible planisphere, which I wanted to call the Star Hat Continue reading “More devices: the Star Bottle and others”
The planet circus in May, and an explanation
This spatial view shows the planets’ paths along their orbits in the month, with sightlines to them from the Earth at May 12.
Continue reading “The planet circus in May, and an explanation”
The sky scene, May 7 evening
Eta Aquarid meteors
These fragments of Halley’s Comet come Continue reading “Eta Aquarid meteors”
The Speed of the Barycenter Settled?
I thought I should wait at least a day to let your answers Continue reading “The Speed of the Barycenter Settled?”
The Speed of the Barycenter
Here is a puzzle to amuse you. It’s a smallish question on which you might like to test your math. Continue reading “The Speed of the Barycenter”