Impossible, unless you change the physics of you alternate world so transistors or nuclear power don't work. In a world with millions of scientists, everything gets discovered when the time is ripe.

And without transistors, spaceflight is so terribly expensive that nobody would start such a large-scale operation.

Impossible, unless you change the physics of your alternate world so transistors or nuclear power don't work. In a world with millions of scientists, everything gets discovered when the time is ripe.

And without transistors, spaceflight is so terribly expensive that nobody would start a large-scale operation such as Project Olympus.