There is no theory that would guide us through interplantary space to another world even if we could control our departure from… — Forest Ray Moulton Copy Share Image
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 Aviation Copy Share Image
There is not in sight any source of energy that would be a fair start toward that which would be necessary to… — Forest Ray Moulton Earth Copy Share Image
