This post is taken from IZULAT blog repost here
We all wonder that are we alone in the entire
universe or there is another beings like us living in a far away planets and
far away galaxies or far away worlds that we could not go to because of lack of
advance technology to travel in space or in the entire universe? Scientists
confirm there might be and they say there could be 36 plus alien civilizations
alone in the Milky Way galaxy where are our planet earth is.The assumption or
confirmation is based on Copernican Principle that planet earth is not special
and it is not the center of the universe.
“The researchers assume that Earth is not special — if an Earth-like
planet forms in an Earth-like orbit around a Sun-like star, hosting a
civilization that develops technologically in a similar way to humans, there
would be approximately 36 Earth-like civilizations in our galaxy. In this case,
other technological civilizations would be sending out signals, such as radio
transmissions from satellites and televisions, on a similar timeline as humans,
also attempting to find other lifeforms. "There should be at least a
few dozen active civilizations in our galaxy under the assumption that it takes
5 billion years for intelligent life to form on other planets, as on
Earth," lead researcher Christopher Conselice said in a news release. "The idea is looking at evolution, but on a
cosmic scale."”(CBS News)
According to the news, finding alien life in the universe is not only using
Copernicus idea or the Copernican Principle but also Frank Drake idea or what
they called “Drake Equation”. Drake Equation is a probabilistic theory that
estimate a probable number of alien civilization in the Milky Way galaxy.
“Previous calculations of alien life have been based on the Drake equation, which includes seven factors needed to find the
number of intelligent civilizations, written by astronomer and astrophysicist
Frank Drake in 1961. The estimates have been extremely broad, ranging from zero
to a few billion civilizations. The team of researchers in Nottingham refined
the equation using new data and assumptions. They found that there are likely
between four and 211 civilizations capable of communicating with others, with
36 the most likely number.” (CBS News)
The main point : According to the news, scientists have concluded that
there might be 36 plus alien civilizations in the Milky Way galaxy using Astrobiological
Copernican Limit or Copernican Principle and Drake Equation.
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