Blog
Few, substantial articles rather than a news feed. Each one explains a method, shows its numbers, states its limits, and links to the code or the document that lets you check it.
-
Calibrating the sky background for Japan
How comparing PlanAstro's light-pollution estimate against 3,531 official Japanese sky-brightness measurements uncovered a regional bias, and what we shipped to correct it.
-
What we will never sell
Plan correctness, equipment protection and basic offline use are never a paid feature. Sky imagery is never sold. Here is why, in the project's own words.
-
Why PlanAstro
What the PlanAstro project is, why its core is open source, and what that promises you as a user.