Becoming aware of the nearest stars is an event that makes the blood tingle; it is like emerging from a hole in the ground. Continue reading “One More Device”
is tomorrow, Thursday June 15
For most of June, and into July, the Sun is so far north in the sky that it doesn’t get much below our horizon.
The evening sky is still almost uninhabited by planets.
Device One was the portable flexible planisphere, which I wanted to call the Star Hat Continue reading “More devices: the Star Bottle and others”
This spatial view shows the planets’ paths along their orbits in the month, with sightlines to them from the Earth at May 12.
These fragments of Halley’s Comet come Continue reading “Eta Aquarid meteors”
I thought I should wait at least a day to let your answers Continue reading “The Speed of the Barycenter Settled?”
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”
The saros, the famous rhythm of similar eclipses a little over 18 years apart, is a fascinating subject with almost endless ramifications, explored Continue reading “Tri-Saros”