A senior astrophysicist at the Racah Institute of Physics at The Hebrew University has claimed that aliens have yet to visit Earth – but that they do, in fact, exist.
Amri Wandel believes extra-terrestrials aren’t getting messages from earth and he has put forward a theory which revisits the Fermi Paradox explaining why aliens have yet to pay us a visit and that they may still do so in the future.
Because humans have only been sending out signals detectable from space since the 1930s, not enough time has elapsed for aliens to receive and respond to our messages. Only stars within 50 light-years have had time to respond since Earth started its space broadcast, he explains. A Beacon in the Galaxy message could in the future be fired into space to be received and understood by an alien civilisation.
“Unless civilisations are highly abundant, the Contact Era is shown to be of the order of a few hundred to a few thousand years and may be applied not only to physical probes but also to transmissions (i.e. SETI). Civilisations are unlikely to be able to inter-communicate unless their communicative lifetime is at least a few thousand years.”
His preprint paper has just been published to the arXiv database.
Amri Wandel is a senior scientist in Astrophysics at the Racah Institute of Physics at The Hebrew University of Jerusalem. Wandel is an expert in astrobiology and chairman of the Israeli Association of Astrobiology and Early Life. He is also president of the International Academy of Sciences San Marino.