>>12296861KSP’s physics are solid, the difference is the actual nature of the planets/moons.
Kerbin is smaller than half the size of the real life Earth, has a much thinner atmosphere, and has less than half of the orbital velocity of Earth, so delta/v costs and thus payload size is much kinder than reality.
Getting to orbit of Kerbin takes about 3200 delta/v. Getting to orbit of Earth takes 7000-9000 delta/v.
The best comparison to this in KSP would be Eve, which has higher gravity than earth and a thicker atmosphere, conspiring to make the delta/v cost to reach orbit of Eve from the surface to be nearly the same as that of Earth. Arguably, orbiting Eve is even harder than orbiting Earth, because it has more than 1g of gravity, meaning you need more thrust.
