Hello, Alternate History folks. I just registered for pretty much this one thread. Call it research or open-source brain-storming.
I am working on a project which will require an alternate history frame work.
I need to get from
Point A:
Hero of Alexandria pursues his Aeolipile into practical application as a viable steam engine, first deployed, let's say, 62ishAD.
...to
Point B:
in, let's say, 269ishAD, Rome puts its first milestone on the center of the Moon's face with a historic marble marker engraved with an arrow pointing straight up to Earth, and an inscription: "Omnes viae Romam ducunt"... all roads lead to Rome (I hope )
...to Point C:
The dark ages befall the remnants of the Roman Interplanetary Empire circa 1200AD... in which a few dozen deep space colonies lay mostly isolated as the monolithic hyperspace gates built by the Romans fall into decay.
Just imagine a picture of ancient Rome with the vapor-trail plume of a rocket arcing away from it in the third century AD, and then let your imagination run with it.
I'll be chiming in with my own ideas and comments as we go. Thanks for the input!
There's no way that spaceflight would take place so quickly after the invention of a primitive steam engine.
First of all, there has to be a reason why Heron's steam engine is put to use in this ATL. In OTL, it was never used to do any work, and was intended as merely a demonstration of what can be done. The only application I'm aware of is that it was used to automatically open temple doors, in order to create the appearance of divine intervention.
I once pondered a scenario whereby Archimedes invents calculus c. 200 BC by surviving the siege of Syracuse, instead of being killed. He gets taken captive as a hostage by the Roman general Marcellus, and spends the remainder of his life (likely short as he was pretty old by 212 BC) as a guest similar to that of Polybius by Scipio.
Recent investigation has revealed that Archimedes may have actually invented something that passed for primitive calculus, but that it was so ahead of its time and so esoteric that it barely got noticed.
In OTL, Archimedes was already an obscure figure less than 200 years later, despite his great achievements, such that Cicero had to do a special investigation to discover his dilapidated grave in Syracuse, which he restored. I postulate that, as a Roman guest, he would've achieved greater notoriety, fame, and recognition, possibly even having an academy founded in Syracuse called "Archimedia." This would've attracted notable scholars throughout the Mediterranean that might give a scientific boost to the time period, especially after 31 BC, when Rome officially annexes Egypt, along with Alexandria.
By having access to more advanced calculating techniques, there would be fewer errors in scientific judgement and perhaps great tech progress. For example, Ptolemy of Alexandria would've never postulated a geocentric universe. It was already clear from Eratosthenes (3rd century BC) that heliocentrism was the way to go, and for a while, there were two competing schools in astronomy. Geocentrism ended up becoming more widespread by the Middle Ages, which was an outrageous stupidity. In this ATL, I'd suspect that either an alt-Ptolemy, or perhaps Hipparchus, would formulate a heliocentric model that would catch on.
Some early inventions that might come off an alt-aeilopile (perhaps one that turned gears instead of just spun), might be railroads, and steamships. Railroads would be a useful upgrade to the already widespread Roman road network. I don't anticipate them being in widespread use until about the reign of Septimius Severus (c. 193). Probably they'd be used first for military purposes, and later for commercial, as Septimius Severus was first a general. Around the same time, steamships would make an apperance. Unlike steam locomotives, steamships would likely be used initially in commercial shipping and transit, because the Mediterranean had by then been thoroughly free of piracy and foreign threat, removing any need for military application. The Empire relied on the Mediterranean as a kind of maritime highway that allowed for widespread trade and communication.
As for industrialization, I don't foresee that any earlier than around 300, as much of the 3rd century would be spent in anarchy. By this time, there are no wars of conquest and therefore fewer slaves to labor, necessitating labor-saving factories. Industrialization would come too little too late to rescue the declining empire, but may prolong its successor, the Byzantine Empire.