Space 01
How Long Does It Take to Get to Mars? The Orbital Math
About 7 months, but why? We derive the 259-day Hohmann transfer, the 26-month launch window and why most real probes arrive in 200 to 230 days.
orbital mechanics
Space 02
Could a Nuke Stop an Asteroid? Armageddon vs DART Math
Splitting Armageddon's asteroid needs 10⁸ Tsar Bombas just to beat its own gravity. DART shows what works instead: millimetres per second, years ahead.