It is conceivable that the earth-mass planet Proxima BIt is located in the habitable zone of the nearest star to the sun, Proxima CentauriHars a civilization similar to ours.
Due to small differences between them and our history, it is possible that they had achieved our current technological situation somewhat. Consider a small margin from Head Start for Proxima B Science, from order 0.00002 of the age of the earth. This is 100,000 years, which means that the astronomers of Proxima had used telescopes to discover the earth a hundred millennia ago, in the way we discovered Proxima B on 24 August 2016. How would that discovery be reflected in their space age?
Driven by long -term curiosity, the rocket builders of the most advanced space agency at Proxima B could have chosen the habitable planet earth as an exciting destination for their chemical missiles. This would be an admirable vision that NASA did not yet answer. But residents of Proxima B may have realized that science is better than politics and therefore chose to invest more in space exploration than in military budgets. In that case they can serve as better role models than our politicians.
At a speed of 30 kilometers per second, or 0.0001 of the speed of light C, the chemical missiles that were launched a hundred millennia ago could have reached us. Around the time of the launch, people on Earth left Africa based on an early modern Human fossil found In a cave in Israel.
Taking into account that Proxima Centauri moves at a speed of tens of kilometers per second compared to the sun and in the past was further away, the journey could have taken 100,000 years, which implies that these chemical rockets could have come around the current time. But are these chemical missiles the first spacecraft that arrives at our back garden from Proxima B?
Probably not. In the centuries that passed after the first attempt to launch chemical missiles to Earth, the Proxima B scientists could have developed more advanced propulsion technologies. Suppose it cost them a millennium after the invention of chemical missiles to continue hydrogen fuel that brings their spacecraft to a speed that is ten times faster, 0.001 ° C.
If the later generation of Proxima B scientists were to maintain the ambition to reach the earth, the second wave of spacecraft launched to Earth would have completed the journey in just 10,000 years and could have arrived on earth for 89,000 years earlier than the first wave of chemical missiles. A millennium later, when nuclear propulsion technologies make a travel speed possible 0.01c or 3000 kilometers per second, the journey to the earth would have only lasted 1000 years. This wave of nuclear spacecraft could have reached the earth 97,000 before the first chemical rockets.
Finally, if after another millennium the Proxima B scientists develop light bags that are pushed to 0.1 ° C by powerful laser rays, in the spirit of the Breakthrough Starshot Project That I led over the past decade, these lighting halls would have reached the earth within a century, which suggests that they could have been here 96,900 years before the first chemical rockets from Proxima B.
In summary, nuclear spacecraft with a factor of 10 in a spacecraft rate per millennium of research and development (R&D) on Proxima B, now that nuclear spacecraft have first reached the earth, about 97,000 years ago, followed by light sea pie, followed by hydrogen rock. In that scenario, hydrogen-driven spacecraft would have reached us a few millennia before the large pyramids were built in Giza, Egypt. The more advanced spacecraft would have arrived because people from Africa migrated.
By investigating the equipment that comes on earth as a function of time, terrestrial archaeologists can distract his speed and decipher the history of propulsion technologies on Proxima B based on the time it took to come to earth from the same planet of origin. This analysis would be a new research area: archeology of interstellar propulsion.
This thought experiment implies that we have to expect advanced technologies to visit us before we detect chemical rockets that arrive at our back garden. Like me in one Recent paper With my student Shokhruz Kakharov, even the slowest chemical missiles takes about a few billion years to reach us from the other side of the galaxy. Since most stars formed Billions of years before the sun, most galactic spacecraft could have made the journey to the earth now.
Documented human history is only 8 millennia long, but it is possible that archaeologists or geologists will find traces of propulsion technologies that are much more advanced than we have developed so far. Is it also possible that such a visit has caused human intelligence? In that case, biologists must find a related anomaly in human DNA.
A New study Reported that Proxima Centauri often flourishes, with torches that wear the energy output of the Hiroshima -Atoom bomb every few minutes. The stability of the sun may seem more attractive for a technological civilization on Proxima b.
Their recognition of the earth as a favorite destination would have caused massive migration of aliens to earth, an interstellar exodus of much larger proportions than those of the Israelites of Egypt to the promised country, celebrated this week in the Jewish Holiday of Pascha. The arrival times of the waves of Proxima B migrants would depend on the timing of their departure, reflected in the propulsion technologies they use.
If the shortening of the travel time exceeds the delay in the departure time, the generation of migrants who first arrive may include the descendants of those who had the patience to leave last from Proxima B. The descendants of the impatient migrants who used chemical propulsion will be inhabited by people, but also by people not only from people will not only be out of the earth for not only out of the earth for not only from the earth to not only be out of the earth for not only from the earth to not only be out of the earth for not only from the Earth of the Earth for not only from the earth for not only people from the earth for not only people from the earth for not only people from the Earth of the Earth of the Earth for not only by people. Proxima B. The earth would appear for them as a time machine and the technological history of their home planet.
