Like chess, but the board is the sky. Climb six ranks, from your naked eye to the edge of the observable universe. Every lesson is a fact with a source — NASA, ISRO, ESA. No myths, no filler.
Sources are named on every lesson. Indian missions (Chandrayaan, Mangalyaan, Aditya-L1) are covered
because they are part of the real story of space — not as decoration.