Alien That Is Really Exist?

Questions about whether there is life outside of planet Earth is one of the three questions most often expressed on the scientists and astronomers. Two other question is whether God really exists and what happens if we are sucked into black holes.

According to Charles Liu, a professor of astrophysics from the City University of New York's Staten Island and researchers from the Hayden Planetarium at the American Museum of Natural History, he always gets at least one of the three questions above while in public spaces.

Over the years, he searched for the best answer to all three questions were based on scientific evidence and that he found his personal opinion. As for the answer whether there are aliens, the following answer:

"Yes. The universe is so vast and the laws of nature apply very consistent across the vast space," Liu said, as quoted from Space, June 28, 2011. "It is likely that there is only one life to flourish in the entire universe is almost zero," he said.

Liu said, if there is life that can grow in one place, certainly there are similar life elsewhere. The next question, whether extraterrestrials exist?

"Yes. But if the creature has landed on Earth? The answer is no," said Liu. "None of that is touted as evidence of the emergence of an alien (extraterrestrial) on Earth contains water after tested scientifically," he said.

The next question, Liu said, is whether we will communicate with them?

Since the delivery of radio waves made of planet Earth, the signal has been running about 50 million light years from here, or about 300 trillion miles.

"However, our own Milky Way galaxy wide size reached 600 thousand trillion miles. This means that radio signals take centuries before it could get out of this galaxy," he said. "Another civilization in the galaxy, if any, do not have the opportunity to receive radio signals that we send, unless they really exist around here," he said.

So it is with us, Liu said. "Despite various efforts, we are almost impossible to detect radio signals from nearby stars. Especially from a distant star," said Liu.

If so, refer to Liu, is there any chance that we will be able to make contact with extraterrestrial life? "The possibility is always there. But the chances are very, very small," said Liu.