There is no theory that would guide us through interplantary space to another world even if we could control our departure from the earth; there is n…

- Forest Ray Moulton

There is not in sight any source of energy that would be a fair start toward that which would be necessary to get us beyond the gravitative control o…

- Forest Ray Moulton

There is no hope for the fanciful idea of reaching the moon because of insurmountable barriers to escaping the earth's gravity

- Forest Ray Moulton