फर्मी पैरेडॉक्स Fermi paradox part 2 @sciclaimer

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Fermi paradox part 1 in hindi || कहां है सारे एलियन by Physics for physicists
   • Fermi paradox part 1 in hindi ||  कहां है ...  


The Fermi paradox, named after Italian-American physicist Enrico Fermi, is the apparent contradiction between the lack of evidence for extraterrestrial civilizations and various high estimates for their probability (such as some optimistic estimates for the Drake equation).
Michael H. Hart formalized the basic points of the argument in a 1975 paper.[3] They include the following:
There are billions of stars in the Milky Way similar to the Sun. With high probability, some of these stars have Earth-like planets,[6][7] and if the Earth is typical, some may have already developed intelligent life. Some of these civilizations may have developed interstellar travel, a step the Earth is investigating now.
Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in a few million years. And since many of the stars similar to the Sun are billions of years older, this would seem to provide plenty of time.
According to this line of reasoning, the Earth should have already been visited by an extraterrestrial civilization, or at least their probes.
Although he was not the first to consider this question, Fermi's name is associated with the paradox because of a casual conversation in the summer of 1950 with fellow physicists Edward Teller, Herbert York and Emil Konopinski. While walking to lunch, the men discussed recent UFO reports and the possibility of faster-than-light travel. The conversation moved on to other topics, until during lunch Fermi allegedly said suddenly, "But where is everybody?" (although the exact quote is uncertain).
There have been many attempts to explain the Fermi paradox, primarily suggesting that intelligent extraterrestrial beings are extremely rare, that the lifetime of such civilizations is short, or that they exist but (for various reasons) we see no evidence.

अब आप लोगों के मन में यह जिज्ञासा जरूर ही उत्पन्न हुई होगी की आखिर यह फर्मी पैराडॉक्स (fermi paradox in hindi) है क्या ? तो , बस थोड़ा सा इंतजार कीजिए क्योंकि मेँ इसके बारे में आगे बताने वाला हूँ और वह कहते है न ! सब्र का फल मीठा होता हैं | इसलिए थोड़ा धैर्य तो आपको रखना ही पड़ेगा |
मित्रों ! पृथ्वी में शायद ही ऐसा कोई व्यक्ति होगा जिसको परग्रहियों (Aliens) के विषय में पढ़ना उबाऊ लगता हो | खैर आपको यहाँ जानकार हैरानी होगी की फर्मी पैरेडॉक्स ही वह सिद्धांत है जिसके जरिए आज वैज्ञानिक अंतरिक्ष में मौजूद परग्रहिओं के बारे में पता लगा रहें हैं |
तो , चलिए आगे इसके बारे में पूर्ण और विस्तार से और भी कई सारे रोचक बातों को जानते हैं |