Fermi Paradox

Astronomers says it could take about 1,500 years before earth could have a possible alien entry. This,they argue is because of the sheer size of the Milky way and the amount of time that it will take to receive our signals and respond. Patience is a virtue, they say. Whether you're waiting in a queue or waiting to finally talk with an alien. According to recent informations, Cornell astronomers say that, due to the sheer size of the Milky way, it will take a while [about 1,500 years] before earthlings can reasonably expect to hear back from any extraterrestrials who could've picked transmissions from earth. "We haven't heard from aliens yet, as space is a big place- but that doesn't mean no one is out there. It's possible to hear any time at all, but it becomes likely we will have heard around 1,500 years from now," says astronomy student Evan Solomonides from cornell University.
Solomonides is also the Co-author of a new study that analyzes what's known as Fermi Paradox. In his work, he uses calculations to help uncover the reason that humanity  has yet to hear from any little green men (or women). The Fermi paradox named after physicist Enrico Fermi, is the apparent contradiction between the lack of evidence and high probability estimates (e.g. for those given by Drake equation) for the existence of extraterrestrial civilizations.
But Solomonides says that the Galaxy is too vast. As such, it will take a long, long time for communication to happen. "Even our mundane, typical spiral galaxy-not exceptionally large compared to other galaxies- is vast beyond imagination," he concludes. To make things clear, we know that 1 light-year is around 9.5 trillion kilometres. That is a pretty long way. But our Milky way is almost 100,000 light-years across. So we have plenty of chances and time for the Alien races to contact us, We shouldn't over rule many Whistleblower's facts who risked their lives to state the existence of extraterrestrials.