In the time it takes us to travel from the orbit around Kerbin to the Mun, through what angle does the Mun move along its orbit? Enter your answer in degrees, to two significant figures.

If the time taken to travel to the Mun is T, and the period of the Mun's orbit is P, which of the following is a correct expression for the angle in degrees through which the Mun moves along its orbit in this time?

How long will it take for us to travel from a point on the original orbit to the orbit of the Mun, assuming we start counting the time only after we actually depart from the original orbit(i.e., from the time we actually change to the transfer orbit)? 

If m, m , m, m, kg and kg what is the period of this transfer orbit?

Enter your answer in ks (thousands of seconds) to 2 sig fig. Do not write the units.

To calculate the period of the orbit, we need to know the exact mass of the Spacecraft.

To calculate the period of the orbit, we need to know the mass of Kerbin.

If m, m , m, and m, what is the numerical value of a?

Enter your answer in Mm (millions of metres) to 2 sig fig. Do not write the units.

1. Which of the following is a correct expression for the semi-major axis of the transfer orbit from the orbit around Kerbin to the Mun?

In the following:

=height relative to ground on Kerbin,

=radius of the planet Kerbin,

=radius of the planet Kerbin,

=orbital radius of the Mun (around Kerbin).

Suppose a spacecraft is in orbit around a planet and is about to head off to reach the moon of that planet. How can they fly to the moon most efficiently?

To reach the moon we launch ourselves on an orbit that takes 10 days. If the moon orbits in 20 days, how should we launch so that both the moon and the spacecraft are actually near each other?