Every memory has coordinates
postaMap Blog
Notes on the sky and the ground beneath it. How to find your way around the constellations with nothing but your eyes, what the zodiac band really marks, and why the arrangement of stars over one place at one minute never comes back. The same astronomy that goes into every map we print.
Why No Two Night Skies Are Ever the Same
Four independent motions decide which stars stand over a given place at a given minute. Here is how each one works, and why a date and a set of coordinates are enough to reconstruct any night....
How to Read the Night Sky Without a Telescope
Start with four anchor patterns, learn how the sky turns through the night, and find out why the stars above you depend on your date, your hour, and your latitude....
The Twelve Zodiac Constellations and Where to Find Them
A practical guide to the twelve zodiac constellations: what the ecliptic actually is, which ones are easy to spot, why your birth sign is not overhead on your birthday, and the thirteenth constellation nobody counts....
