Other Life in the Universe

Other Life in the Universe

Are we alone?

We have been in doubt if we are alone in the universe for a long time. Since the mid-20th century, that is why, this speculation became science itself. "Exobiology" trying to determine the conditions necessary for life and a place that allows developing, and using the technical tools that may allow us to put it.

Drake Equation
In 1961, an American radio astronomer, Frank Drake, the theoretical equations proposed to estimate the chances of the existence of intelligent life in our galaxy. Formula that he thought the subject of discussion. The objective is to calculate the amount of communication civilizations that might exist in the Milky Way and a reasonable expectation to receive the signal.








The equation is N = (R *) x (FP) x (Ne) x (Fl) x (Fi) x (Ft) x (L)

• R * said the rate of star formation in which the culture develops possible. This number is a fraction of all stars in the galaxy with the exception of giant stars that have a life too short time for the emergence of civilization communications.
• Fp is the fraction of stars that have planetary systems
• Ne the number of planets similar to Earth, located in the zone which covers a support formation conditions of life.
• Fl equal to the fraction of planets where life could develop.
• Fi Fraction expressed Fi planet where life has reached the stage of intelligence.
• Ft is the fraction of civilizations that have developed technology that allows them to send signals into space.
• L states when living civilization that can send radio signals that can be detected
• N the number of civilizations in Milky Way communication that can send radio signals that can be detected. This amount varies depending on the value used for each parameter in the above; result stems from 1 (our civilization) to millions or even billions.

Traces of life on Mars?
In 1996, found traces of a meteorite micro fossils from Mars. Long micro fossils resembles bacteria on Earth. It is estimated that falls in the Antarctic meteorite 13,000 years ago, but has been crystallized 4.5 billion years before the march, when the planets formed. Micro fossils is certainly alive when the Mars is warm and humid. Dry riverbed on Mars is the remainder of the time when the planet has a climate that supports life.











Message for Extraterrestrials (Aliens) In 1974, Arecibo radio telescope has been send a message in binary code form to the globular clusters in the Hercules constellation, consisting of hundreds of thousands of stars, which will reach 25,000 in the year.

(source: QA International)