PHP In Space
summary
Uses PHP for concrete space math: a PHP geospatial extension with a dms_to_decimal helper, haversine and Vincenty distance routines that accept GeoJSON and a radius override (example: Kerbin walk ≈ 11,100 km); date_sun_info and sun-altitude reporting (22.87° shown); rocket math: 30 kN engine, ISP ~300 s, max wet mass ≈ 3,058 kg, calculated ΔV 20,439 m/s vs ~20,100 m/s needed but atmosphere prevents orbit; demos include staging, aerobraking, failed parachute and sphere‑of‑influence transfers.
AI-written summary · about
chapters (11)
- 0:00Start
- 2:49Extensions extensions extensions
- 6:57The Earth is not a sphere
- 9:07Which direction does Jeb needs to head to?
- 12:04Drawing the GC line
- 16:28Calculating the position of the Sun in the sky
- 18:14Thrust to Weight Ratio (TWR)
- 27:31Velocity calculation
- 29:49Vis-viva equation (circle)
- 34:03Getting to Duna
- 47:44First attempt...
