Short, accurate field notes on the mathematics and physics of spaceflight — written the way we teach: real numbers, no hand-waving.
Live by an Earth clock on Mars and within three weeks you are eating breakfast at sunset. The math of the sol.
Look at a rocket on the pad and you are mostly looking at a tank. A logarithm is the reason.
Miss the window and a finished, billion-dollar spacecraft sits in a clean room for two years. Here is why the door is so narrow.
It did not fail from a cracked weld or a dead battery. It failed because pound-force met newton, and nobody noticed.
Half the sunlight, dust storms that black out the sky for weeks, and a to-do list that can never pause. On Mars, the atom is not an option — it is the plan.
You do not need "all of math." You need a specific chain of it, in a specific order. Here is the chain.
The popular answer is "three times higher." The real answer is 2.64× — and the catch is your spacesuit.