The very slender Young Moon will on September 5, at 10h by Universal Time, pass one degree south of Venus, close enough Continue reading “Icy cocktail”
Category: geometry
No shadow in the well
Our piece about the December solstice provoked an interesting discussion. Continue reading “No shadow in the well”
Heads and horizons
Today is Rosh Hashanah, “head of the year,” Continue reading “Heads and horizons”
Is there a smile across the sky?
You may be one of the many who have recently joined this blog, and I heartily thank you. It’s a “community” – friends who can converse, because you can freely comment. Continue reading “Is there a smile across the sky?”
More about Allocentrics
That is, the positions and brightnesses of stars as seen from viewpoints other than our own. Continue reading “More about Allocentrics”
Allocenters
The nearest star, beyond the Sun, is Continue reading “Allocenters”
The attitude of the Swan
A famous feature of the sky is that a huge cross stands upright as it goes down to set in the west. Continue reading “The attitude of the Swan”
Angular arguments
You’ve been looking at my description of Comet C/2022 E3 (ZTF) – and may getting a look at the comet itself Continue reading “Angular arguments”
How to touch the Moon almost
Daniel Cummings, famous for his Moon Hat and other neat products, set me a puzzle, which my brain was too weary to tackle.
Accelerating planets and absurdities
A slightly improved version of my diagram of our motions in space – Continue reading “Accelerating planets and absurdities”