I am not a rocket scientist!
I am not sure they always go into earth orbit but if they do it may be necessary in order to get to the best flight path to the moon. Maybe conditions for blast off from earth are not compatible with direct shot to moon.
I am not sure they always go into earth orbit but if they do it may be necessary in order to get to the best flight path to the moon. Maybe conditions for blast off from earth are not compatible with direct shot to moon.