What does the "alignment of stars" have to do with predicting the future? Especially if the future is for some other universe? The alignment of the constellation Orion, for example, is simply an accident of our perspective from Earth with respect to the stars making it up that are spread out between 250 LY and 1250 LY away. If we move laterally 50 LY away from here our perspective changes and we no longer see the "Orion" shape. Making predictions based on the apparent alignment of stars reminds me of the line from Monty Python and the Holy Grail:
"Strange women lying in ponds distributing swords is no basis for a system of government. Supreme executive power derives from a mandate from the masses, not from some farcical aquatic ceremony!"
Swords or the alignment of stars is same-same.
You should re-read Titor's Saga. According to his saga he didn't time travel to cause the collapse of the USSR. According to his story the Russians were the "good guys" and his shotgun rebellion tribe's allies. He welcomed the war. The only downside of his general nuclear war, aside from exterminating 3 billion human beings, was the inconvenience of having a low post-war birth rate, they had to scrounge for salt and they had to use 12-volt dc battery electrical systems. Too bad his post-war tribe spent all their resources on building time machines in order to obtain a 1st generation POS IBM 5100
instead of re-building the Florida electrical grid and mining some damned salt. I recall that I did point out to him that it seemed to me that they had their heads up their arses spending their limited resources on time machines instead of more pressing needs. He wasn't amused. But for god's sake, they had computers that could guide a craft down the throat of a wormhole and magically guide the tail of the wormhole, from the past into the future, such that the wormhole exited exactly where they needed it to be in 4D spacetime...yet they needed the piece of crap 5100 to do exactly what? Compile Unix? WTF? I have a Raspberry Pi 4 that is more powerful than the 5100 and it runs multiple Linux distros like a damned champ and does it from a micro-SD card.
This idea of freely traveling the "multiverse" completely ignores the reasoning behind Hugh Everett and John Archibald's paper regarding the relativistic formulation (interpretation) of quantum mechanics. The idea behind it was you
can't travel between these universes. The idea was to get rid of absurdities like the Schrödinger's Cat paradox argument against the Copenhagen Interpretation of quantum mechanics (Bohr, Heisenberg, Born) by getting rid of the necessity of an observer. If you can travel between the universes then you still have Schrödinger's simultaneously dead and alive cat. Dealing with the collapse/non-collapse of the quantum wave function is a lot more complex than Schrödinger's cat. Naively suggesting that travel between such universes is possible based on the many worlds interpretation completely negates the very theory relied upon in the first place - the many worlds interpretation.
True, there are other theories that posit multiple universes (bubble universes for example) that have nothing to do the the wave collapse function. But they are not "parallel" worlds; their histories would have nothing to do with histories in some other universe. Good luck traveling to one of them. It's likely a one-way vacation because there is no way back plus there's no guarantee that the laws of physics are the same as ours. Their creation would not rely on the physical laws of this universe.
BTW: If you're familiar with the Schrödinger's Cat paradox what you might not know is that Schrödinger wasn't serious. It was a joke for Heisenberg and Nels Bohr to absorb. It pointed out the absurd (in Schrödinger's view) outcome that the Copenhagen Interpretation leads to. In Schrödinger's cat thought experiment the cat is in the box in a mixed state of both alive and dead until someone opens the box and looks. His argument was later turned around and used as "proof" of the Copenhagen Interpretation. I guess that somethimes a good joke can backfire.
